If a revive is unsuccessful, you can use Apple Configurator to restore the Mac. A restore updates the firmware, updates recoveryOS to the latest version, and erases and installs the latest version of macOS on your internal storage. When this process is complete, any data on any internal volumes is unrecoverable. You must restore the firmware and erase the internal flash storage if reviving the firmware is unsuccessful or if you can’t start the Mac from the startup volume or the recoveryOS. References: Revive or restore a Mac with Apple silicon using Apple Configurator - Apple Support

Screen Sharing is a feature that allows you to view and control the screen of another Mac on your network. However, Screen Sharing cannot be turned on if Remote Management is already enabled on your Mac. Remote Management is a more advanced feature that allows you to remotely manage Mac computers in a commercial or business environment. Remote Management and Screen Sharing are compatible with Virtual Network Computing (VNC), but they cannot be used at the same time. To turn on Screen Sharing, you need to turn off Remote Management first in the Sharing settings of System Settings12. The other sharing settings, such as Remote Login, Media Sharing, and Remote Apple Events, do not affect Screen Sharing and can be turned on or off independently. References: Turn Mac screen sharing on or off - Apple Support, Share the screen of another Mac - Apple Support

Turn on Find My Mac in iCloud settings so you can locate, lock, or erase your Mac.

On your Mac, choose Apple menu > System Settings, then click [your name] at the top of the sidebar. ...

Click iCloud on the right, then click Find My Mac.

https://support.apple.com/guide/findmy-mac/set-up-fmm53101237/mac

An IP address that starts with 169.254 suggests there may be a problem with DHCP. This is because 169.254 is the prefix for a link-local address, which is an address that is automatically assigned by the device when it cannot obtain an IP address from a DHCP server. A link-local address allows the device to communicate with other devices on the same local network, but not with devices on other networks. A link-local address indicates that either the DHCP server is not available, not configured properly, or not reachable by the device. To resolve this issue, the device should try to renew its IP address from the DHCP server, or the DHCP server should be checked for any errors or misconfigurations. The other IP addresses are valid addresses that can be assigned by a DHCP server, and do not indicate any problem with DHCP. References: DHCP Error: What It Is and How to Fix It - Lifewire, 7.4.4 Module Quiz - DHCPv4 (Answers) - ITExamAnswers

You can use your Apple Watch to unlock your Mac computer’s screen saver and approve authentication requests from macOS and other apps, without having to enter a password. This feature is called Auto Unlock and Approve with Apple Watch, and it requires that you have an Apple Watch with watchOS 6 or later, a Mac with macOS Catalina or later, and that both devices are signed in with the same Apple ID using two-factor authentication. To turn on this feature, you need to go to System Preferences > Touch ID & Password > Apple Watch and enable the option next to the name of your watch. Then, whenever you wake your Mac from its idle state or an app requires authentication, you can double-click the side button of your Apple Watch to unlock or approve the task. References:

Unlock your Mac and approve requests with Apple Watch - Apple Support

Authentication Services | Apple Developer Documentation

Approve App Authentication Requests with Your Apple Watch in Catalina

The Files app is an app that lets you browse, organize, and manage files stored on your device, iCloud Drive, and external storage devices. The Files app supports different storage formats forexternal storage devices, such as USB drives and SD cards. According to Apple, the supported formats are EX-FAT, MS-DOS (FAT), Mac OS Extended (HFS+), and APFS1. These formats allow the Files app to read and write files on the external storage devices. The Files app does not support NTFS, which is a format used by Windows. NTFS is not compatible with the Files app, and the Files app can only read files from NTFS-formatted devices, but not write or modify them2. To use an NTFS-formatted device with the Files app, you need to reformat it to one of the supported formats using a Mac or PC. References: Connect external storage devices to iPhone - Apple Support, The Complete Guide to Using External Storage on iOS and iPadOS - Gizmodo

Fallback recoveryOS is a hidden boot mode on Macs with Apple silicon that allows you to access a second copy of recoveryOS in case the regular one fails. To start up into fallback recoveryOS, you need to shut down your Mac completely, then double-press and hold the power button until you see “Loading startup options” on the screen. Then you can click Options and Continue to enter the recovery utilities window. Fallback recoveryOS is different from regular recoveryOS in that it doesn’t have the capability to change the system security state, so you can’t use Startup Security Utility or disable SIP in this mode. References:

Use macOS Recovery on a Mac with Apple silicon

Fallback Recovery OS - A Hidden Boot Trick on M1 Macs

Mac Not Booting Into Recovery Mode? 7 Fixes to Try

How to boot an Apple silicon Mac into Recovery mode

How to Enter macOS Recovery Mode on Apple Silicon Macs