How can I disable Stolen Device Protection when Face ID is not working on iPhone?
How to turn it off if your Face ID is not working
[Re-Titled by Moderator]
If Face ID is disabled there is no way to turn off Stolen Device Protection; if there was, it wouldn't provide any protection against a thief or finder breaking into the iPhone.
Thus, if Face ID is not working and you can't fix it, the only option is to restore the iPhone to factory settings→Restore your iOS device to factory settings - Apple Support
Most often if Face ID doesn't respond that is a hardware problem, but here are some troubleshooting tips→If Face ID is disabled on your iPhone or iPad Pro - Apple Support. Note the last step if all else fails is to contact Apple Support using the link in the support article.