Tracker music support
What is the problem you are facing?
Inability to play, catalogue and share tracker music formats such as MOD, S3M, XM, IT and all such.
What are the possible drawbacks or issues with the requested changes?
One possible drawback is while those are definitely are music formats, they are not sound formats - they need to be rendered before playing. However, there are libraries that can do it, like libopenmpt.
Context
There are troves of wonderful music made by the hacker scene. From the 80s to present day, the demoscene and otherwise electronic musicians continue to create music in this format. And it's free! Most of the time it is.
Also, the size of those files often measures in kilobytes, because they were made for systems that are really cramped for space and memory. They are unbelivably tiny. That means you can have a formidable library of music in the peanuts of space.
There is a site that publishes tracker music: https://modarchive.org - but frankly I find it lacking in almost every sense compared to any Funkwhale instance. This music needs proper catalogization, and, if I may be so bold, popularization through sharing and streaming.