Well, yeah, it exists. Not sure if calling it bread is honest since they don't all meet the fundamental "leavened ground grain" paradigm, but that's pedantic as hell.

This recipe https://www.wholesomeyum.com/recipes/low-carb-bread-recipe-almond-flour-bread-paleo-gluten-free/ is a fairly standard version. I find such options edible, and by that I mean that you eat the bread. They make shitty sandwiches though, and not much better for sopping up sauces and soups.

Just be aware that low carb really only means that they won't spike blood sugar the way grain flour does. That's a good thing, but don't expect it to "fix" blood sugar staying higher on a regular basis.