Never noticed that before, but APNG is quite a good thing.
It is working on my Safari-Browser, see the attached Image, this is one animated PNG

Should work in Chrome and Firefox, too... anybody not seeing the animation?
As I learned, Apple started using APNG with iOS10 in 2016 for all iMessage-Stickers and -Animations.
Why use GIF anymore?
Thanks for learning something new and quite cool
There are also some "convert to APNG" converters available:
https://ezgif.com/gif-to-apng
https://icons8.com/animizer/en/gif-apng-converter