Which USB-C adapter are you using?
https://www.amazon.com/dp/B071WYF9HP/ref=cm_sw_r_cp_api_i_NzueCb285W7WS
It was on sale a couple days ago for $20.
And don’t be fooled, there is a link to a “newer model,” but it is not as good (slower USB-C output and USB-A is not as versatile).
Oh and FYI, the USB-A port uses Anker’s Power IQ 2 technology, which unofficially supports QC3.0 (9VDC+). This likely means that plugging in the TapTes (via extension cable) would provide fast wireless charging, although you’ll have the deal with the extra cable (DIY posted earlier on how to hide it).