As still not too late, your System76 laptop description link says: 1 x Thunderbolt™ 4 (please do not use that one at all). Yet, please try here related procedure with this laptop left USB-A (as it provides more power) port (and adequate cable):
As well, here is another post on why not to use Intel® JHL6540 Thunderbolt™3 Controller (as this port provides 15W to bus-powered devices):
Edit: Confirmation command would be something like: $ lspci | grep -i Thunderbolt.