oh lol you got the same issue as someone else

it's <audio controls="" loop="" not <audio controls="loop"
(yeah i know it looks weird but it's the one that works ahah)

there you go

<div align="center">
<div class="progress" style="width:270px;border-radius:60px;">
<div class="progress-bar progress-bar-striped progress-bar-animated" style="height:35px;background-color:rgb(182,21,83);">
<audio controls="" loop="" style="mix-blend-mode:screen;padding:5px;width:270px;height:35px;border-radius:60px;opacity:1;">
<source src="https://cdn.discordapp.com/attachments/723673715732381820/1193071362630238268/Cherry.mp3">
</audio></div></div></div>

nice music btw cute