.NET applications using .NET Core or later are intended to be cross-platform, so technically, Linux can run .NET apps. (The use-case I know is running .NET sites on Linux servers)

Not looking for a dumbphone at the moment, but

There’s a KaiOS jailbreaking community … I’ve seen an XMPP client and a Matrix one too.

This is good and opens up a path for using other messengers via bridges.

To configure most suckless tools you need to… recompile them. The readme says:

Because dwm is customized through editing its source code, it’s pointless to make binary packages of it. This keeps its userbase small and elitist. No novices asking stupid questions.

But if you are trying to compile suckless tools, you are already in too deep.