I went to Corsair RAM Memory Finder for your Asus Motherboard from here: https://www.corsair.com/us/en/memoryfinder?type=motherboard
There were several 4 RAM Kits at 3200Mhz. Here the top 3 most expensive ones:
There are many RAM Kits that you can choose from above link. I would try and purchase a 2 RAM Kit of 32GB at 3200Mhz or 3600Mhz
Those RAM from that list in the link Corsair tested with your Asus Motherboard for compatibility issues.
See if any of those listed on the link above is on Asus QVL List for RAM for the 5000 Series Processors. That way you can verify how many DIMM Slots it will be compatible on your motherboard.
You will need to open a Corsair Support ticket to verify if that specific motherboard will recognize a 4 RAM Memory kit for the RAM model you want to purchase.
I would just go strictly by Asus QVL List for the 5000 series processors which shows how many DIMM Slots each RAM Model is compatible with. That list is very recently updated from 11/12/2020.