I believe cars for Ireland are now shipped to Dublin from Zeebrugge. It would make sense for RHD cars for Ireland to be loaded onto HOEGH TRAVELLER.
The good news is that once you have been told your VIN you will be able to check to see if it's definitely onboard by checking the Hoegh website. That's not the case for shipments on other vessels. So, I suggest you start checking for a VIN appearing in your account's source code. There are threads elsewhere on this forum that describe how to do that. I used to check hourly, or so it seemed, but then, I am pretty laid back.