Before Brexit we had two types of British Expats Immigrants. Those that blended in and integrated into the system and were naturally pro-EU. Then the were the others who stayed in their little communities, never integrated , never registered with the system. Most of those that didn't integrate have gradually left and gone back to the UK. Houses that belong to Brits left abandoned. Some have tried to be sold but most haven't.
Then after Brexit and Covid a new wave of Brits started buying houses. Being in a rural community and my son-in-law being a builder, we, and everyone else, know what's going on for miles around.
A lot buy the house without thinking, expecting to use it as a holiday home first and then retire later on. Most have discovered that it's not going to work out that way.
My favourite one at the moment are a couple who bought a small house for €100k in a nearby village, have spent nearly €100k doing it up, still not finished. The house will never be worth anywhere near €200k.
Originally they were going to do as use it as a holiday home and then retire later. Then after realising that they couldn't do that they said that they renovate houses and sell them on. I don't think they yet realise that the house won't be worth what they think it will even after renovation and secondly they have to pay 36% tax on any profit from the purchase price and the sales price if they sell in the first ten years. They also admitted that they voted Brexit but didn't think it applied to them. There are dozens like these fools just around this area.