While the Vatican does have walls, anyone can pretty much just walk on through them with perhaps a trip through a metal detector, so not sure what you mean.

The Catholic Church also does not teach that there cannot be restrictions on immigration, it simply says that we should treat people with dignity while enforcing such restrictions.

Neither Francis nor Leo (not sure which you mean by New Pope) have stated deportations or restrictions on immigration are wrong. Unfortunately, they are often taken out of context or do not provide clear statements which leads to confusion like you are experiencing.

That's a deep thought worth of x.com.