Personally, I’d prefer an USB-C or USB-C with PD (Power Delivery) cable to the QC 3.0 cable or 9V inducer.

If you look at the Brume’s spec sheet the Brume requires 1x USB3.0 Type-C Power Supply. So, an USB-C or USB-C with PD (Power Delivery) cable is more suitable.

Is your power bank you’re getting PD compatible?