Some people I know are leaving (though panic is never a good thing). Some told bizarre stories of how they were questioned at the border. And yes, some were asked to unlock and hand over their phones.
The borders are open all right, no reason to close them. People opposing the regime are going away, the best possible outcome for dictator. No need to waste a lot of time and manpower on finding dissent if it just disappears on their own. And so population becomes a bit more docile, ignorant or even cooperating.
This was happening in former communist countries too - not everybody who spoke up against the regime went to jail. Some were just thrown to western Europe and forbidden to come back.
When all young ambitious people leave, your country goes even more to shit than the shit it's already in. Of course they block the borders!
The active and popular rebels only.
The common dissident, was not free to leave, he had to shut up and work.
Their borders are still pretty open, no? Just watch as they will close them down soon.