The 'Find My' feature relies on Location Services, iCloud and WiFi all working.
Have you enabled Location Services, signed in to iCloud and reconfigured your WiFi to work with Sequoia?
See the guide from Apple below:
Have you enabled Location Services, signed in to iCloud and reconfigured your WiFi to work with Sequoia?
See the guide from Apple below:
Set up Find My on Mac
Set up Find My on your Mac to help you locate and protect it if it’s ever lost or stolen.
support.apple.com