I guess that's another way of asking if those of us who are deconverts from some religion, miss that religion.

People often miss the belonging / community / refuge that their religion might have provided, perhaps some of the traditions and any good memories. But that is usually because the so-called "love" provided by their former comrades was withheld based on them no longer assenting to the unsubstantiated assertions, dogmas, and rules that defined their former faith. This is common in conservative, authoritarian, fundamentalist circles, where it's much more important to be "right" than to be good / kind / loving. Indeed, "righteousness" (right-ness) is their counterfeit version of goodness.

In more liberal religious traditions, you have more space to drift away from strict, overtly signified conformance, and more privacy to think your own thoughts, so it's possible you could retain the advantages of your social group without being required to commit intellectual suicide. This is where I'm convinced a lot of uncounted atheists are to be found.

Personally I never missed my fundamentalist faith, as it provided nothing for me to miss other than just being familiar, and inside of a few weeks, any new situation becomes your "new normal" so that just wasn't a practical issue.

The biggest problem, for me, was re-training my brain to think critically after years of mental junk food.

Not the micro details, but the macro outlook is always kind of there. God as presented in the bible is equally as likely as a sentient, omnipotent 2001 BMW 3 series coupe controlling the universe from a massive German super garage beyond the furthest moon of Coruscant, but it's not impossible. Just super, super goddamn unlikely.

After being born and indoctrinated into Catholicism, it took me about four decades, after concluding that belief in God was unsupportable, to become comfortable with my atheism.