Anker has launched the MagGo Power Bank (5K, Slim) in some North American countries. The portable accessory is particularly compact and can be used to charge two devices simultaneously. Other features of the Qi2-certified charger include support for pass-through charging and LED indicators.https://www.notebookcheck.net/Anker-MagGo-Power-Bank-5K-Slim-compact-accessory-now-available.931669.0.html
Are you certain that this supports pass-through charging? That feature is not mentioned on the Apple store site.