Even if you are on modern 5G network, and set your phone to never connect to 2G/3G network, your location is still compromised because the overall network is still backward compatible to support someone who might be trying to reach you from a 2G or 3G network which run on the insecure SS7 protocol. This enables protocol downgrade attacks. Only way to insulate yourself from this while still being on mobile networks is to use a "data-only" sim and stick to purely Internet based secure messaging and calling apps and not use the phone number for anything.

The way mobile radio/phone networks have evolved (trusted walled garden with backward compatibility) vs Internet has evolved (untrusted with end to end security) is in stark contrast to each other.