False, ritual is an adjective. The word church is the noun. So, no, it means what it says and that is church.
Commentaries are nothing more than opinion. I can read the text itself and see that it says that it is a change of church, not rite. The noun is church. Just to show that the word ‘rite’ is an adjective and that church is the main word here is another part of the same canon.The practice, however prolonged, of receiving the sacraments according to the rite of another ritual Church sui iuris does not entail enrollment in that Church.
The word ritual is completely absent from the second part of the statement where the word Church stands alone. Further, it distinguishes between rite and ritual church.