I'm sure there will be launcher apps for tabs, as there is for phones. A good android launcher will allow you to doctor all sorts of things including app shortcut size, position etc.
I use Next Launcher on my phone which has endless appearance options but it's not free (because I'd never steal apps of Aptoid, or anything like that) There are loads of free launchers, just search "launcher" in play store, then install a few and have a play about until you find one that suits.