Earlier quoted context omitted.
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. https://apps.apple.com/us/app/number-shield/id1319082167
Begone is better than Number Shield plus its free. https://apps.apple.com/us/app/begone-call-blocker/id15968181...
...though the creator of Begone will hopefully realize that every entry in its version-history starting with that same rant about fake ad campaigns is making it look more sketchy than ignoring the issue would.