There are some apps that detect fake base stations monitoring your traffic

There are apps that uses accelerometer and gyroscopic sensors to detect if phone is snatched execute certain action based on this

Use app lock, so in case your phone is opened, apps will still be locked --> lock galley + filesExplorer(any) + settings + playstore + Browser(All installed) + Cloud/RemoteDrives(any) + Any syncing apps + Contacts + Email+messaging apps etc

(Hell all apps for utmost paranoia)

Use apps that remotely sync your phone specific folder/gallery every time new file is created (So when taking photos or recordinf something, if pbone got snatched, data is deleted + phone is broken or formattef/wiped against your will, your files have already synced to remote location so no worries

Snoopsnitch https://f-droid.org/en/packages/de.srlabs.snoopsnitch/

Stayput https://f-droid.org/en/packages/org.y20k.stayput/

plucklockex https://f-droid.org/en/packages/xyz.iridiumion.plucklockex/