Spoofing isn’t ended at all
Almost every spam call has that I get, is spoofed.
Someone here explained it, once.
I think the spoofed calls use a legacy transport tech that can’t be forced to validate.
How do you verify it is spoofed? Have you asked your carrier to drop unverified calls from your service?
Can't that legacy transport be blocked / not-be-peered with then? That's what usually happens with old insecure tech that is being phased out.