Based on the HSE web site, it look like Ireland will finally allow anyone who wants one to get a COVID vaccine.
“If you're age 18 to 59 and not in one of the groups above, you can still request a vaccine. Talk to your GP or pharmacist about your reasons for wanting a booster” – https://www2.hse.ie/screening-and-vaccinations/covid-19-vaccine/get-the-vaccine/covid-19-vaccine-booster-dose/
Boots is accepting bookings online (including for Flu vaccine + COVID booster appointments):