Can you explain your autistically treating this question like it's a dogma which must be believed?
According to Vatican II, the "Catholic church" is in partial communion with buddhists, muslims and hinduists "of good faith".
Either you believe in this garbage and you are not Catholic, or you do not and you see the logical conclusion that calling "Leo XIV" a Pope is a mortal sin.
You can't have it both unless you are schizophrenic.