I tested 25+ microSD cards in the 5B if it helps anyone!

ROCK 5 Series 5B/5B+
4

Sure!

58.9GB "SK Hynix USD00" UHS SDR104 SDXC card as /dev/mmcblk1: date 03/2022, manfid/oemid: 0x0000ad/0x4c53, hw/fw rev: 0x1/0x0