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.