In addition to the reasons explained by the Pope, for the choice of his name, I dare to add one more, which is perhaps present in the Holy Father. Leo XIII was Pope from 1878 to 1903.
One of his collaborators told how, on one occasion, while he was praying, he remained completely motionless. His face expressed horror, and at the same time amazement. Half an hour later he wrote the prayer to St. Michael, which some Christians pray at the end of Mass.
This prayer is a petition to the archangel to cast satan into hell. Nothing more to be chosen, Leo XIV has filled us with hope, reminding us that good will overcome evil.
Prayer to St. Michael continues to be very important.
122 years later the newly elected Pope has taken up the baton, also in this fight against evil, proposed by Leo XIII.
May the diffusion of this prayer be greater and greater, in order to obtain help in the fight of every Christian against evil.
This is how the prayer reads:
Archangel Michael, defend us in the struggle; be our protection against the wickedness and wiles of the devil. We imploringly ask God to keep him under his empire; and you, Prince of the heavenly militia, cast into hell, with divine power, Satan and the other evil spirits who go about the world trying to lose souls.