This seems to be a private, unheard instance which peole should know about.
" New Jersey Gov. Phil Murphy (D) recently revealed a story that he said reflected Biden’s deep reverence.
On a trip to Germany in 2013 that came at the prodding of Murphy, then the U.S. ambassador to the country, Biden said he had only one favor to ask: Could the ambassador find an English-speaking priest to say Mass for Biden and his family? Murphy located a priest, and about 10 people gathered in a hotel room for the service.
“For the Catholics like me, the notion you’d be traveling on a regular Sunday and go to those lengths, it’s a measure of a guy’s true faith,” Murphy said. “It’s a quiet faith. It’s a genuine faith. He’s not wearing it on his sleeve. Which makes it, in my opinion, even more impressive.”
Murphy said he had kept the moment private until recently, when he grew tired of what he views as unfair attacks on Biden by defenders of Barrett.
“Just as her faith shouldn’t be dragged into it, his shouldn’t either,” he said. “You can’t have it both ways. That’s what these guys do. It’s hypocritical to treat one person and their faith one way and another person and their faith another.”
Just as there is a ‘Catholics for Trump’ group, there are “Catholics for Biden”.
As to Trump:
"Trump’s attraction to Catholics and other religious voters can seem quizzical on the surface. He rarely goes to church and has said he can’t ever remember asking God for forgiveness. He has downplayed the importance of Communion, flippantly saying during his 2016 campaign: “I drink the little wine, which is about the only wine I drink, and I eat the little cracker.”