I'm telling you because you mentioned that the prayer from Jesus started with "Our Father"..we weren't discussing churches, but Biblical content.....and no, the Catholic church does not end the lord's prayer with the Doxology.
I was reading about The Lord’s Prayer recently. One of the statements that really surprised me was that one of the most popular versions for Catholics was one that ended with The Doxolgy. I had never even heard that said. So, yes, they do say that and for it to be one of the top versions, it has to be said by a lot of Catholics. You may not say it but others do.