There's a useful iOS app called Number Shield that lets you block all calls coming from numbers that match the first six digits of your phone number. That's the most common spoofing technique, so it really does help.
E.g. if your number is (555)555-1234 it'll block anything from (555)555-0000 to (555)555-9999.
E.g. if your number is (555)555-1234 it'll block anything from (555)555-0000 to (555)555-9999.
https://apps.apple.com/us/app/number-shield/id1319082167