Almost everywhere is restricting flights so international migration is difficult if not impossible and very few people will risk travelling and getting stuck in other countries.
International migration will be restricted in the short-run (as most countries are under lockdown), resulting in mismatch between the demand and supply of work force in long-run. The pandemic is expected to reduce the *braindrain* too especially from India and China, the populous countries of the world.
There is decline in international migration and an increment in border surveillance. Cross-border movement of people and cargo is on the decline. Border management strategies are more inclined towards cross-border controls and inter-state separation at border points as opposed to cross-border cooperation. Regular migration is greatly reduced. Irregular migrations are left to un-controlled border crossing points between neighbouring countries with porous borders. Youth migration from Africa to the EU will depend on the kind of migration. If it is regular migration, it has greatly reduced. Irregular migration across the Mediterranean sea is still being reported (See UN News website: https://news.un.org/en/story/2020/05/1063592 )