No, they did ship without resistors (that’s why I ordered them ).
Seems to be some sort of weird incompatibility (especially because this very adapter was reported to work with BPI-R3 and the AsiaRF WIFI6-cards I am using).
off topic
My next and last attempt is to use an mPCIe to m.2 key B adapter and if that fails I will give up on the idea to install 3 mPCIe-cards.
Thanks for sharing this workaround. Using tape is a clever quick fix for those who aren’t comfortable with a soldering iron, though desoldering the R228 and R230 resistors seems to be the recommended permanent solution to resolve the voltage mismatch on this board.