Despite the product name and thumbnail, it is in fact the Asetek Premium AMD AM4 / AM5 Retention Kit minus the thumbscrew nuts: https://www.asetek.com/wp-content/uploads/2022/06/Installati…
Can confirm as I have ordered and picked one up. I am not sure of the precise difference between AM4 and AM5 mounts but clearly there is enough to warrant Asetek to release this product.
Cheap replacement for your Asetek based AIO cooler.
You can request a bracket from NZXT from here for free though it'll ship from the US and you'll need proof of purchase for your cooler and AM5 mobo and serial number of your cooler.