https://youtu.be/WK5ss2mLgGY
It feels like I've searched much of the internet for a USB-C charger for a LiFePO4 battery and I couldn't find one. Whilst it's not perfect, I used my DIY skills to build a proof-of-concept device with two simple modules.
Parts used (affiliate links): USB-C PD Decoy https://amzn.to/3GnuNVS https://s.click.aliexpress.com/e/_opmEBd6
DC-DC 5A XL4015 Step Down Buck Converter https://amzn.to/3Tjw03k https://s.click.aliexpress.com/e/_okQMD9a
USB-C Wall Charger (supports 20V) https://amzn.to/404k9tL