Re: "No Touch ID after injuring finger"
" .... Now I can’t add a new finger, delete Finger 2 ..."
Have you tried re-starting the Phone ... ie : often restores order if something is not working as expected.
If needed: See how to:Restart your iPhone – Apple Support
Wondering if Apple Support's iOS 27 articles (links below) can help.
See: Set up Touch ID on iPhone - Apple Support
and
What to do: If Touch ID isn’t working on your iPhone or iPad
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Re: "Now I can’t ... ... ... turn off Stolen Device Protection".
You may want to browse through Apple support's tips:
About Stolen Device Protection for iPhone - Apple Support
Eg: says: "If you try to turn off Stolen Device Protection when you’re not in a familiar location, a security delay starts before you can turn it off."
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More support if needed:
You might want to reach out to the iPhone Support Team:
There's a "Still need help - Get Started" link (online chat, phone, eMail etc.) at the very bottom of their website (link below):
iPhone - Official Apple Support