Manna, Aaron's Rod, Tablets of the Covenant: Hebrews 9:4-5

The manna => the Most Holy Eucharist. Cf. John 6:30ff

Aaron's staff => the Supreme Pontiff. Cf. Matthew 16:18-19

The tables of the covenant => the deposit of faith as transmitted through Sacred Scripture and Sacred Tradition: Catholic dogma.

Ark of the Covenant => the Mother of God/The Catholic Church

Cf. Hebrews 9:4-5

The context of the entire book of Hebrews is the new covenant in the blood of Christ which replaced the old covenant of the blood of animals.