I don’t think there was a formal ecclesial structure of the Maronite Church in Cyprus in the period you describe. There also has never been an internal schism in the Maronite Church, so there are various question marks concerning this “affirmation” date post Florence.
As you may well know, when formal communion is made, it happens by the Patriarch and Synod, not by individual communities. If the affirmation was made in 1182, it was made in the name of the whole Maronite Church. The Cypriot Maronites** were** not and did not constitute a seperate Church. Why that affirmation didn’t include them (if that was the case), or why they had to affirm their union with Rome 250 years later (again, provided that this did happen) should be approached carefully and contextually, based on the history of circusmtances surrounding the issue.
BTW, under what qualification do you state that the Melkites pre-1054 were in communion with Rome?