Well thanks a lot for you fast reply.
I think, I took the wrong approach. I use Ubuntu since dapper and the name Ubuntu Touch misleaded me in the way, that I thought, those well known desktop apps should be my first choice.
When I did not find them in Openstore, I did not look for alternatives but for the "original" in Libertine and Snap.

I am pretty sure, I will be happy with mostly Openstore Apps.

Thank you frytz

Re: Fairphone 5 - 24.04-1.0
Hello all. just trying to start over with UT.
I created a libertine container and installed several graphical apps like libreoffice, abiword, gnumeric.
While abiword and gnumeric start using a very small font size which renders them useless, the libreoffice components just try to start and stop immediately.
I connected with adb shell and started libreoffice there, to see errors, if any. There was none. I used "lomiri-app-launch noble_libreoffice-writer_0.0"

I tried to use the libertine tweak tool, entered the correct container ID and set the Xdpi scaling to different values. This neither had effect to abiword or gnumeric, nor did it help to start libreoffice.

This was the moment I tried to use native snap support. I installed vivaldi and it started with unusable small fonts as well. Neither the UI tweak tool, nor the libertine tweak tool seem to be helpful in this case.
I installed firefox, and it started. However it is just an unusable, transparent shadow in the list of active apps.

My UT is 24.04 stable, with german language settings

So what am I missing?
Frytz