My wife was a Lutheran, she converted when she married , there isn’t a lot of difference in the religions, so she says.
Like your wife, I think more and more Lutherans are heading to the Catholic Church.
She obviously practices the Novus Ordo version of Catholicism and not Traditional Catholicism. Suggest that she check out traditio.com and I’m sure she’ll never say that again. Traditional Catholicism id true Catholicism. Not “fun”, but holy. Of course, if she’s actually looking for another version of the Protestant religion, she’s found it in the Vatican II Church.