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It sounds like you are looking for AMD Gigabyte Motherboards, so here is a Filtered Search of all B450, X470, A520, B550 and X570 AMD motherboards that are made by Gigabyte; https://www.microcenter.com/search/search_results.aspx?Ntk=all&sortby=match&N=4294966996+4294818892+4294812530+4294809069+4294813586+4294810816+4294808789&myStore=false
With this search, be sure to select your local Micro Center at the top of the page on https://www.microcenter.com/ and you can view their stock.
I am looking for the lga 1200 boards which seem to be none existent right now.
I've noticed the same thing, true pretty much everywhere at the moment.
Hopefully, we'll start to see inventory increase in a short time. We're doing everything we can to get more as soon as possible, but I don't have an estimate for when we'll have more in stock.