No, the article showed that non belief peaked a few years ago: There are more butts in the pews than in 2020.

But sentiment hasn’t recovered.

That's not what the article says at all. Perhaps you should re-read it, especially the section that directly contradicts what you are saying about religion and happiness.

If anything, Americans are more religious than they were pre-pandemic (reversing a 30-year trend), and yet they're less happy.