Clip studio paint has an animation timeline I use
Only catch is it has only 24 frames, so I have to make several different sequences, and merge them all in ezgif
They also tend to be huge, so I try to also optimize them in EZgif (without using Lossy gif option, as tapas cannot load Lossy encoding)
Also to get the image closer to the size limit, I crop out only the animated sequence and export the non animated segments in PNG, as to have the pages load more forgivingly on mobile devices or people with crappy internet, it also shaves off a lot of size on the image...
Gifs tend to be HUGE and won't load until the whole image is downloaded, so it's really good to use those optimization tools and cropping even if you do land below the size limit... Just so readers aren't stuck for the slightest waiting unnessicarily...