The beer sold in restaurants (unless they have a full bar license), grocery stores and convenient stores is the 3.2% beer. You can get the unleaded stuff at the liquor store* *
IF* they have it in stock.
BUT, not every store carries the same stuff. Some stores have a good selection, some, well, leave a lot to be desired. And if you are looking for the generic name brand full strength at the liquor store, you will be disappointed. They typically do not carry the full strength version of what you can buy in the convenient stores, usually they carry the flavors that the breweries just do not make in 3.2 level. So you won't find Bud Light at the state run liquor store.
Hope that helps. I suggest if you have a particular flavor that you enjoy, well, just take the above under advisement. I am
Not telling anyone to bring in 'untaxed' alcohol into the state, that might be wrong.
I have been known to accidentally purchase some stuff in, say, Idaho or another state and forget to consume it all before coming home before.
Most LEO's won't piss and moan about it, unless you are bringing in an entire truck load, or its open and being enjoyed in the vehicle while driving down the road. Kinda sucks that I can't enjoy a Michelob Ultra Cactus Lime or Ultra Light Cider on a regular basis, but I didn't make the rules, and people who don't drink, did.
Here is a link to the official explanation of Utah's silly rules-
https://abc.utah.gov/laws/law_residents.html (Note- just because a product is listed on their product price list does not mean they carry it regularly, just means you can order it through them.)
Cheers!