Osman Aga
Banned
You seem to know a lot more about the subject than I do. Do you think the Ottomans would have conquered what became Saudi Arabia? They have a head start because they are already occupying the Hejaz.
Al Haasa was also Ottoman, along with Hedjaz. The interior was worthless and never prioritized other than supporting friendly tribes/dynasties.
Theoretically speaking this is possible. Without Hedjaz or Al Haasa, the interior is no good to be a nation like Jordan, let alone the UAE. But it depends on what Istanbul wants too.