I would try searching "kio" in your package manager.
NathanUp
What distro are you on? Some don't install all available KIO workers and you'll have to install them yourself.
Is this something that is likely to improve going forward?
Like any FLOSS project, things tend to happen when programmers decide to solve a problem for themselves. If you don't the the skills to do this, you could always bring it up on the KDE forum under the "brainstorming" category, submit a feature request on the KDE bug tracker, or sponsor a developer to perform the work.
Seconding Navidrome. I stream from my Navidrome server to my phone, and then via DLNA from my phone to my HiFiBerry / stereo system. It's very nice.
Maybe not - I've heard those things can get really hot inside like a greenhouse
I thought you could only select from a pre-defined list of addons in Firefox mobile?
I find the yunohost mailserver pretty good ootb
Tried updating your bios?
Before the last word.
Those days are mostly gone