Mostly stopped, yes. Although I know a small handful still came after the 2000s. Even students have been coming much less so.
if they can go to Europe they can go to Pakistan. Both by illegal means. Meantime your government apparently does not take back anyone who left illegally.
A great excuse to dump your problems on others.
The only issue is in Europe they get paid and treated reasonably fine. Tell us how much Pakistanis were paying for your Bengali domestic help.