Excellent question!
The Passia services are specific to the Ukrainian and Russian Orthodox Churches - they are not held in the Ukrainian Catholic Church (I’ve heard of some UGCC priests serving them, but it isn’t the norm).
There is no reason why they could not be served in the UGCC but they are a service that was constructed by the Orthodox Saint Petro Mohyla (and there is no reason why the UGCC could not/should not liturgically venerate him either). Mohyla created numerous new services for use in his Metropolia which were largely borrowings from the West. (And there is nothing wrong with that, especially in his time when he struggled to prevent Orthodox aristocratic families from rejecting their Orthodox faith and culture to become Roman Catholic via the Jesuit schools.)
There are more than one version of the structure of the Passia services. Metropolitan Ilarion Ohienko (+memory eternal!) published his own version that is kept in the Ukrainian Orthodox Church of Canada. I have a copy of the Passia used in the UOC-KP which is quite well done.
In essence, after the formal prayers of introduction, the kontakion of Holy Thursday is sung three times (re: Judas and his love of money etc.). Then the two chapters dealing with the Passion of Christ in each Gospel are read (with each Gospel covered over the first four Fridays of the Great Fast/Lent). Either prior or after this, the Akathist to the Passion of Christ can be sung. In the usage of the UOCC, one may also sing the Canon of the Sorrowful Mother of God or the 17th kathisma as it is sung on Holy Saturday. There is also a sermon on the Passion of Christ.
There is also an Orthodox version of the western Way of the Cross that is sometimes included in the Passia service. The UOC-KP has one with 12 stations where the priest carries a Cross around the Church, then stops at certain points for a gospel reading and then blesses the people with the Cross before going on.
I know that Father Serge Keleher (+memory eternal!) sometimes served the Passia when he was in Toronto.
It is a beautiful service and I don’t know why the UGCC hasn’t adopted it.
Alex