Is it Putin's intention to depopulate Ukraine?
Good one.
Step 1 in de-population of Ukraine was the dissolution of the USSR. The last Jews left, and then the Germans and Poles.
Step 2 was the granting of visa free status to Ukrainians by the EU.
Step 3 was the generous asylum terms and refugee benefits.
I mean... you have a situation where a president of Ukraine is going around asking other heads of state to deport people to Ukraine.
The integration with the EU has been a bit too successful.
My personal opinion is that places like Poland and Czechia will never send back their Ukrainians, because they fill an important niche in the labor market and are much more assimilatable in comparison to immigrants from farther away.
The governments of those places would be truly stupid to force the Ukrainians out. So... Ukraine's loss is Poland's gain.