The article does not explain it well. The Orthodox church in Ukraine has officially switched allegience from Moscow to Kyiv, but many parishes did not do the switch and still report to Putin’s servant Kiril. The law will enforce the switch. The religion is the same, so if pro-russian priests choose to leave, I dont think the churches wont stay empty.

And here is a reminder of who Kiril and his cronies are:

Isn’t there one already widely adopted? The rainbow mesh pentagon? Why rebranding?

You could say it is a supply and demand question in a very limited sense. Limited by space. There is no shortage of buildable areas in general, for example, around the cities, but there is shortage of housing in central and attractive places. Releasing building regulations would simply ruin existing quality and turn everything into terrible dense and faceless outskirts we all know. Then the demand would shift elsewhere, to remaining fewer good places, making demand even harsher.

Home ownership is essential for identity of places, so the solution is exactly the opposite: regulate building and secure rights to own your home.