The hotbar in the mod is quite large by default. However, GUI Scale 6 is the only setting which scales pixels equally on my device. Could you create a setting only to adjust the size of the hotbar on screen (keeping it pixel-perfect), while leaving the other menus the same?

I didn't add it yet because of the GUI Scale option from JE, that makes the hotbar much smaller with a HUD Scale of 1 and lower GUI Scale values, for example.
The better solution, I think, is to make an option that restores something close to the JE edition default max GUI scaling, as a "Mobile Interface" option, like PS Vita Edition.

My issue is that all the menus are scaled perfectly except the hotbar. Everything else looks great.

My issue is that all the menus are scaled perfectly except the hotbar. Everything else looks great.

The actual hotbar scale is equivalent to the HUD Scale of 2 in LE, and before version 1.2 it's proportional to the HUD Scale of 1.

HUD Scale 1 was always my personal preference. Config option maybe?

Thanks for the suggestion, added in version 1.3.3