Well, the only way is to move those tabs to the side menu. Once you hide a tab, it’s no longer accessible. If you move them to the side menu, then they don’t show at the bottom, but are still accessible.
The alternative is to build new screens by setting the button action to show new screen instead of go to tab…but you would possibly have to redo whatever you did in those tabs (should be reasonably easy by copying and pasting components). I always use screens if I don’t intend to show a tab in my app.