IP addresses
MAC addresses (physical devices, bluetooth devices in range)
Wifi access points
Cell tower access points
Browser cookies
Browsing history
Search history
Email (and its contents)
GPS paths traveled
Contacts
Apps installed, apps used, frequency of use
Hours inactive
Photos, videos
Just thinking about Google here as I don’t use meta products, but my phone is android…
You didn’t explicitly ask for other suggestions but here’s mine anyway; I’m running tailscale on my pfsense router and sharing my home network cidr over tailscale like someone else suggested. So all my dockers and vms are available over tailscale from anywhere. It’s been highly convenient as my home internet connection is behind CGNAT.