“most lubavitcher yeshivos” there’s no unified body of, say tomchei temimim, who come out and say “we, roshei yeshiva of tomchei temimim/ohalei torah do not believe that the lubavitcher rebbe is moshiach, nor do we believe he is omnipresent, omniscient, divine, or fit to pray to”
Believe me i wish such a declaration would be made by ANY of the organizations you mentioned. It has not.