Theres a few.
Radio North - 846KHz If I remember correctly comreg has visited them multiple times and are fine with them due to them being on MW and their programming being mainly religious and country music
Radio Star Country - 981KHz

There was also an Energy AM around 1300-1400KHz that broadcasted periodically from around Wicklow I think. The frequency changed once or twice and there was a Facebook page for them aswell.

Aswell as the rest listed on the bandscan.

I think they had more high power stations in the 80’s and 90’s, someone was asking on rn if there were more stations on mw than fm, I think they have a few more stations there that can reach the skywave at night, were we only have radio blackbeard, we have the dutch pirates too that we can hear late on an evening. I think too that pirates on fm in both the uk/ireland are much rarer now, quite a number of threads on rn are about it too.

True I do miss hearing energy 106, a long time ago now in the past, the lenghts gone to trying to hear this, that era were anything new would appear, new stations even the launch of licenced stations seem to provide optimism at least were I lived in the late 90's. Energy is online, lj doing his djing else were suppose other stations too doing the do like betty boo…

Seemed like there were stations down in cork, radio caroline, I don't know how resent this video is I saw, there was club fm in 2015, I was interested by that too, think that was still been heard by a dxer 10 years ago must of had some power.