SirMixAlot
most likely no
under battery usage it lists the app,
under privacy dashboard it lists if something like camera / microphone was really used. check that one to see if it really was used (resets if restarted tho)
just from a logical standpoint it is rather unlikely that someone infected you with some very advanced exploit, that for some reason tho needs to use your camera app. that does not really make sense
If you dont have some actual reason to think someone hacked you (downloaded apk, downloaded anything sus, got a weird message, have target on your back),
then it does sound more like you just did this yourself by accident somehow
(you can check the boot hash https://grapheneos.org/install/cli#verifying-installation )