For someone to be canonized, they’re remains have to be in possession of the local bishop. I know this as I have a relative who is a bishop and a Servant of God. He’s buried at Notre Dame but if they want to move towards canonization, his body would have to be exhumed and sent to Uganda where his diocese is.
It costs hundreds of thousands of $$ for the process as eerything has to be translated to English, Italian and Latin prior to being submitted for review.
Thank you for the information!