Reddit mentions of ProTapes PRO Pocket Gaff Tape

Cigartte lighter socket + quality car phone charger + Add-a-circuit kit (check your fuse type) + some quality tape + Right-angle USB charging cable

You wire the red wire on the cigarette adapter to an add-a-ciruit (i.e. with a crimp tool). The black wire goes to ground (i.e. tucked under some bolt someplace, or a ring terminal ). You put the charger in the now-attached cigarette adapter in the fuse area under your driver's side dash. Then you need to route an appropriate USB cable (i.e. with one with a right-angle head or right-angle adapter on the dash cam side) to the under dash area (usually by tucking it under the headliner over the windshield, and then by popping the A-pillar cover off and the side panel of the dashboard, and feeding the cable through). Once you have all the wires under the dash, you just need to hook them up, test them, and then tape them together so they can't come loose.

The advantage of going this route is that you 'own' all the pieces. If any part of the formula isn't working out, you can change just that part. You also get a spare USB-C charging port for free since that adapter has both A and C.