The MagWLED-1 will work with most USB Chargers, power banks or even hubs at low power draw. The maximum power output is 15W at 5V and 36W at 12V, both at 3A current. Check the small print of your power source to see what it's rating is. MagWLED will attempt to negotiate 3A at whichever voltage is configured, but it will settle for "the next best thing".
Some things to watch out for:
Some new USB-C power sources might support 20V, but still not support 12V
Some USB-C power sources might support 12V power, but not at 3A
Although many power sources are rated for 3A, many start dropping voltage as they approach their current limits. This might lead to the device turning off.
For 5V operation, almost any new USB-C power source will support 3A. For 12V operations, take an extra look at the specifications and be wary that some cheaper brands might not stand up to their specifications.
Some good quality USB-C chargers:
Anker 45W (single-port, very affordable includes cable and very good performance)
Ugreen Nexode 45W (dual-port, might be more expensive, but very good performance)