If it’s a Meta client on either end doing the decryption does end-to-end encryption really protect you from intrusive tracking? Only Meta know if they’re using

If it’s a Meta client on either end doing the decryption does end-to-end encryption really protect you from intrusive tracking? Only Meta know if they’re using that information for sure. Their track record on abusing things like 2 factor phone numbers for snooping isn’t great though.