I was living in Ireland the time, so maybe this isn't relevant.
However, I had just moved to Ireland having been away for a long time, and was able to get a mortgage.
Brokers etc wouldn't talk to me, the only people that entertained a conversation were AIB and BoI.
Both of these places have parceled off mortgage stuff to an office outside of Dublin it appears. Any type of local banking doesn't appear to exist any more in this area. BoI seemed unbelievably bad, whereas AIB at least initially gave the impression of not being awful.
I think it's continious employment history that they care about primarily, that employment history is preferably in Ireland, but if you're dealing directly with lenders (not brokers) they'll look at employment history in other countries.
My application was during the pandemic, and it was an awful experience. I ended up going to my local AIB branch roughly daily, asking the rep what needed to be done *that day*. The process seemed broken, things got lost, unless I physically turned up and exerted pressure on the rep, nothing happened. AIB subcontract out a lot of things, eng report, various checks, etc to the lowest bidders. These guys also won't do their job unless they are harassed. Because they are not AIB employees, but were required to do their thing by AIB and were paid by AIB, somehow all of this didn't get done until I was passed everyone's number and pressured them to do it. People lied constantly. At the end of the process the seller threatened to sue me because they didn't believe that the lender could be this bad, and the local bank manager wrote letters promising that I wasn't taking the piss, things were just broken.
I dunno, like I said, this was during the pandemic, it was in rural ireland, I didn't have any Irish financial history, and relentlessly chasing people down isn't something I enjoy. So all of things didn't help. Having said that, while it did happen in the end, it was extremely tough going.