I ordered this from Amazon and happy with it so far.

USB C to USB C 3.1 Gen 2 Cable... https://www.amazon.com/dp/B08FXZLHJ9?ref=ppx_pop_mob_ap_share

This is what Opal told me: "Your C1 requires USB 3.1 for power / data transfer speeds so you will want to make sure that whatever cord you purchase is USB Type-C to USB Type-C 3.1 Gen 1 or Gen 2."

I ordered the following and it works:

https://www.amazon.com/gp/aw/d/B08FXZLHJ9?psc=1&ref=ppx_pop_mob_b_asin_title