My animation won't export with audio in 1.19.4

Version: 1.19.4

Problem: Whenever I export my animation it plays without any sound. When I upload the file to discord however, it plays with sound, but no video. It only has a single image.

What I’ve tried: I’ve looked up tutorials, and clicked the beta video thing when I exported, but that didn’t work, I made sure the audio is an mp3 within the animation so maybe it’s having a conversion issue when it’s exporting? I have no clue. I don’t know how those things work.