Default media embed showing up in Dev, but not in Prod

I have 2 servers, a dev and a prod. They’re not perfectly in sync, but they should have more or less the same configurations. At minimum they have

The same version of all themes
The same version of all modules
The same version of Omeka S (4.1.1)
The same version of PHP (8.1.30)
The same OS with the same patches applied (Ubuntu 22.04)

Despite this similarity, when I view an item page configured to have a media embed for an audio file, on Prod, I don’t see the embed, even though it’s there on Dev. I’ve tested in both the foundation theme and default theme, and it does not appear to be a theme specific issue. In theme settings for both sites, media embed is enabled for items.

I’m trying to get the Transcript module (ver 4.1.1) working. I have both Mirador and UV installed, along with Blocks Disposition, but this behavior occurs with all 3 disabled. As an alternative solution, getting transcript working with one of these other viewers would be acceptable.