>it isn't Google.
It is Google. The JPEG XL standard evolved from a codec Google made, Google was involved in the standardization process, and Google heavily contributed to the reference implementation of JPEG XL.
https://ds.jpeg.org/whitepapers/jpeg-xl-whitepaper.pdf
Editors:
Jyrki Alakuijala – Google, Switzerland
Jon Sneyers – Cloudinary, Belgium
Luca Versari – Google, Switzerland
Jan Wassenberg – Google, SwitzerlandAnd Google also removed jxl support in Chrome in '22 (only to put it back in recently)
Yes, but unlike WebP it wasn't exclusively designed and developed by Google. That's a big difference.