The following are several small stands designed for the popular HX200Q6 power bank on Amazon.

https://www.amazon.com/Portable-36800mAh-Tri-Outport-External-Compatible/dp/B0936GZ7H3/ref=sr_1_1?dib=eyJ2IjoiMSJ9.oTzvo8C6WUrRVoIPhswqWliCRljs1ZobmO7SfPVtInt49UVNZCfPUNe99smO6zsN.7a5CoyvSbnpKDHZXtlKYUdUIE1n07XCoE4

In the version with a clip-on design, it can be fixed with tape or installed through the screw holes.