my uncle is a catholic priest..
sometimes, an individual priest will bend the rules, but for the most part it is not allowed...
there are immediate members of the family that he could not perform the wedding for because he basically is not allowed..
he still came to the weddings, just could not partake in any official way
I’ve always been told that a Catholic could marry a non-Catholic in the Catholic church if the non-Catholic agreed to raise the children of said marriage as Catholics.