I get why though. I moved to Dublin from the US (from an expensive part of California) and I was shocked by the rent. It was more expensive than apartments I was paying for in the US, but Irish software wages are a fraction of what you’d get in the US.
If you're irish, there's no point putting yourself through the misery of living in Dublin. You can just go live in London, or work remote and live anywhere in the EU.
Honestly, as a software dev you are better off in the US because you're going to be on the winning side of that income inequality.
Not all cities with rent control keep such a registry. (e.g., Los Angeles doesn't keep a registry, but does tell landlords the maximum they can raise the rent each year.)
https://www.tenancy.govt.nz/rent-bond-and-bills/market-rent/
Doesn't Ireland have a similar saas service?