Why CSS3 animations and filter aren't visible in my codeplayground?

Question

Animation are not visible . Only texts, tables, lines and colors are visible in my sololearn app. I write these code in my computer. But they are not visible in my phone😧😧😧
https://code.sololearn.com/WI05akGpXSPL/?ref=app
https://code.sololearn.com/WSB2dmW8qAis/?ref=app
https://code.sololearn.com/WJ8tus9azMuc/?ref=app

Answer 1

It's working fine

Answer 2

Try adding these prefixes
https://developer.mozilla.org/en-US/docs/Glossary/Vendor_Prefix

Answer 3

No, in my phone they aren't
Working😭😭😭