Gnome Software is showing the sections buttons in a squeezed format.
I have already tried to reinstall the package with no perceived changes.
If i do create a new user on same computer, everything is showed correctly. - so it's supposed not to be a package installation problem.
Do you know where the user related files are stored for gnome software? Maybe are there any command to clean or reset it?
Are you use a different Theme?
Did you tried to end the gnome-software Process?
Try deleting the cache files, as well:
rm -rf $HOME/.cache/gnome-software
Thankyou all for the suggestions! Im using default Zorin Purple theme, from Zorin Appearence.
I have already tried to delete cache for flatpak and gnome-software, no changes.
Also tried to run the session without any extensions, no changes.
When Gnome Software is open let it open and then open the System Monitor and look in the Process Tab for ''gnome-software''. When You have found it, click on it and end the Process. You will see that the Gnome Software Window will disappear. Open Gnome Software again and look if it works.
Unfortunately, nothing changes. Have tried ending and Killing it.
Looking on my user files, the only hint of user data for Gnome-software is on dconf. But it seems to have Settings data as well, so not sure if it's safe to be cleaned. That is the only file i haven't cleaned.
That is a strange request to lick gnome software!
I think you just won the internet for today, sir 
I haven't see any settings inside dconf that are related to styling... but it seems this would be a good way to reset it. If this issue is important to you, you can always give it a try.
it's not that big deal hehehe, btw i tried licking it and it's not tasteful 
I'll make a system snapshot and may give a try on dconf.
Anyways, everything works perfectly, except for the recent mixed languages inside the app after some updates. — thus this is on new users as well and on a VM I created, so not going into it for now.
Oh, I oversaw that.