Found in the Roman Missal, below is the Collect from the Mass for the Pope, especially on the anniversary of Election:
Oh God, who in Your providential design
willed that Your Church be built
upon blessed Peter, whom You set over the other Apostles,
look with favor, we pray, on Leo XIV our Pope
and grant that he, whom You have made Peter’s successor,
may be for Your people a visible source and foundation
of unity in faith and of communion.
Through our Lord Jesus Christ, Your Son,
who lives and reigns with You
in the unity of the Holy Spirit,
one God for ever and ever. Amen.
