Should link to compatible adaptors list
https://docs.puri.sm/Librem_5/Known_Issues/Evergreen.html says
"The Librem 5 is incompatible with certain phone dock devices that rely on USB-C connections."
it could link to https://source.puri.sm/Librem5/firmware-tps6598x-nonfree/-/blob/master/dp-alt-mode-adapters.org for a list of tested adapters and their quirks.