Linux: Re-allocate multimedia keys and function keys?

ch
1

As an example, let's take an InfinityBook Pro 14 v4 with Ubuntu Budgie:
In this notebook, for example, you can make sound louder and quieter only via Fn + F5 or Fn + F6. That would annoy me with the Fn +, I would rather just press a key (eg F5 or F6).
It's clear to me that you can't simply repackage Fn + F5 and F5 if the manufacturer does not have an option for that. But now we come to my idea / my idea: (please read carefully, is a bit complicated)
I want the "multimedia keys" (Fn + F1-12) to stay the same as Fn + F1-12. In addition, I would like F1-12 to do the same thing. In the keyboard settings (from Budgie / KDE Plasma / etc) you can for example add more keyboard shortcuts for sound louder and sound quieter. There I would then assign F1-12, so in the sound louder / quieter example F5 and F6.
However, this is stupid if other programs have F1-F12 as keyboard shortcuts inside. Now I do not want to change that by hand for every program, but I would like to have a system-wide solution.
I imagine it like this: that when I eg. Super + Shift + F5 press (or instead of Super + Shift + another key combination, just one that is never used otherwise), the "default assignment" of F5 is made (eg reload page in the browser), but not just F5 (because that is currently on tone quieter make).
Yes, I know, it's a bit of a hassle, but it's very important to me, as it would be annoying to have to press Fn + F1-12 for multimedia keys every time.
Does anyone know such a solution for Linux?

Al

I want the "multimedia keys" (Fn + F1-12) to stay the same as Fn + F1-12.

You can't change synonymous because they are hard-wired functions. Amongst other things, the volume control buttons on my Thinkpads are completely independent of the operating system.

In addition, I would like F1-12 to do the same thing.

That in turn should go with tools like https://wiki.ubuntuusers.de/xbindkeys/ https://wiki.ubuntu.com/X/Config/Input and https://wiki.ubuntuusers.de/Xmodmap/.

However, this is stupid if other programs have F1-F12 as keyboard shortcuts inside

Well that's what you set, if you change it globally, yes override. You will have to choose one because the system can't know when you mean something.

Linux Hase