There is a version of the PG Riptide board with a vertical M.2 E-key slot for wifi (under the IO shield). Unfortunately the availability of the wifi version is quite poor.

Would it be feasible to add the m.2 slot to the non-wifi version. Looks like the non-wifi version lacks the metal holder and probably also the board socket. I was thinking it might be possible to solder a compatible E-key header on the board and buy a suitable holder/bracket.

Haven't found a good picture of the location of the wifi card though, as it's behind the IO shield. Probably an idiotic idea though.

Edit: went for the MSI B650m-A WiFi instead. First PCIe slot is a bit lower than the others, giving more space between gpu and cpu/psu. Additionally it comes with USB 3.2 gen2 front I/O, whereas the Asrock has gen 1 only