However, according to an external info source, the card reader controller chip that the expansion card uses seems to be Genesys Logic’s GL3230, which (according to its Features page https://www.genesyslogic.com.tw/en/product_view.php?show=70), only supports UHS-I speed.
Are there any errors in the product description, or it is that the SD Expansion Card uses a different controller chip(e.g. the GL3230S) that supports UHS-II speed cards?
Looks like the driver supports multiple gl32xx series chips. I’d guess that he just accidentally truncated the S off the part number. Seems more likely than Framework’s description just wrongly adding UHS-II.
Tho I understand you want confirmation & presumably contacted support with the question already.