Anker offers a set of Powerbank and USB-C power supply.
Review: Ugreen USB-C Power Bank with 18 Watts tested
Small and very practical power bank for everyday use.
Power bank without auto switch off
A simple USB-C adapter keeps your power bank from switching off automatically.
Review: Litionite Raiden 160 Watt 154 Wh Power Bank in short test
A big power bank with modern and powerful connections. You need the right USB-C charger though.