Seems to me like there won't be a driver available in the next weeks/months that suits my needs.
Although I can't properly assess, if Adrians work so far will work for what I try to do.
Just fyi: I need that PCI wireless card working in an APU 2C4 operating FreeBSD/pfSense.
I believe you mean Mini PCIe.
I have 3 to recommend. Ubiquiti SR71-E, Mikrotik R11e-5HnD and a cheap option the Generic AR9385 AR5BXB112(off ebay).
Currently transmitting from a NanoBSD test build on APU2 built fresh with the Mikrotik module. It only does 5ghz.
It does take different pigtails with MMCX to RP-SMA needed. I used MMCX to TNC but that is what my particular antenna uses.