I’m not using the M.2 E key slot for WiFi/bluetooth so I’ve ordered the following adapter: https://www.amazon.co.uk/KALEA-INFORMATIQUE-©-PCIe-Adapter-cable/dp/B078883MK2
This gives: PCI-e 1x slot and an internal USB 2 port
It is kind of cursed but I hope it is going to work 
At least according to the schematic, both the USB pins and the PCI-E ones are connected.
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