I had a serious issue with camera . My A70s camera was not responsive. Camera failed. I tried everything I know for 2 days. I was disappointing but now its working good.pls follow this procedure.
Copy data (Gallery)to pc.
Switch off again .
Restart ,when logo samsung logo appears, goto recovery by pressing power and volume up.
Now wipe cache/clean up portion 4th/5th option.
Then same screen do 1st option (reboot)
Wait for a minute it takes time.
When restarts mobile , u can login with Google and Samsung account.
BUT IMPORTANT NEVER RESTORE APPS.
Install only default apps.
Update phone default apps.
Then install other apps from store as new.
Now check the camera
TRY IT...Best wishes 😻😻