itch.io

I wouldn't recommend using Tenor or Giphy unless you want your gifs to be used in every social media application and become public domain.
There are other file hosts you can use. (Though be warned that Imgur is blocked in the UK)

This is terrible advice because both of these sites are used for training ai models. So unless you want to risk you art being stolen to train more slop that will eventually flood the front page of this site. I'd avoid these options