Hi @linux_dude
The partition size is fixed on Ubuntu touch.
There is no debate about it.
I use to say that if you cannot work around those limitations, you shouldn't do it at risk of damaging your system.
Ubuntu Touch has an immutable filesystem for consistency across devices, stability, and ease of use and maintainability.
If you want to install desktop apps on your device, the beta version of what is supported are snaps.
You can use snapz0r from the open-store to enable it on your device.
You can also use Libertine like @arubislander already mentioned.
Or you can find another way (that I won't explain because of previous § )
Know one thing though, it's on purpose and people working on the system itself know better than me.
If you know better, feel free to join the effort and contribute to our current issues to demonstrate your skills.
It's the best way to be heard.