Anecdotally where I live, four relatively big apartment blocks have been built in the last few years
Not one of them had a "for sale" sign only a "letting" sign, so I can only presume that a big landlord or developer is involved
Only time I see a "for sale" sign is on houses and apartments seem to be for letting only
AFAIK, there have been no, or very few, new apts sold to individuals in Ireland in years.
The vast majority of new apts built are built-to-let, due to the very high rents available.