Considering how widespread the Brown Scapular is, he will probably know.
I just asked and he said yes.
Don’t worry. God loves you. Literally. It is His will that you make it to Heaven!
I could be wrong, but I would be greatly surprised if even one soul who prayed the Divine Mercy Chaplet and the Rosary every day were to perish in eternity. The only way I could imagine that happening is if they intentionally continued in sin. As if they said “I will pray these and continue in sin.” With Holy Confession, the Holy Eucharist, and all the graces obtained through the two, and all of the graces obtained by praying the Divine Mercy Chaplet and the Rosary, that soul should try not to worry. God is merciful.