Thande
Donor
It's rather disingenuous to use the word 'liberated'. For a start there wasn't any British presence in Ireland before the United Irishmen rebellion - the Act of Union was imposed basically because William Pitt the Younger thought that the (Protestant-dominated) Irish Parliament had failed to stabilise the situation and put down the rebellion. The only 'liberation' was in that the UI wanted to sweep away old feudal laws and the Test Acts i.e. the same as in France, Italy and the Rhineland (which usually came down to 'liberating' peoples' heads from their necks ).So, in the event the French liberated the Irish totally from Britain, what would be likely to happen? Could the UI reform significantly to appease the Catholics...and in the event of a collapse, would another republic likely emerge? In any case, I don't recall specifying anything other then the French liberated the Irish under the UI, and approximately 100 years later (in 1900)it was a united state. I said nothing about what occured between those occurrences.
If it did happen, and if you don't have French troops holding it down, then expect the UI to hold Ulster, Dublin and parts of Leinster, but the rest to break up. Possibly Chinese-style warlord states in Connaught and Munster, or the two united as some sort of Jacobite kingdom (or with a king drawn from Irish nobility, as the only remaining Jacobite claimant at this point was a dead duck). If Napoleon takes over in France as OTL he might unite the two as a kingdom but with Napoleonic institutions.
True, it could have broken up and reunited later.