I don't think they lost too many Catholics ...
I’m not one of the picky people here so forgive me.
The overall Catholic vote for Trump in 2016 was 52%.
A certain number of Catholics are black and the blacks everywhere were in the upper 90% range for Hillary so I didn’t find a breakdown of non-black Catholics for Trump.
Catholics apparently are not one issue opponents of abortion (as the 81% white evangelicals for Trump largely are.) Jews still vote Dem (24% Trump) and do not normally care if Israel is preserved or (God forbid) wiped out.