Explainer / Messiah
2 Peter 1:1
Simon Peter, a servant and apostle of Yeshua Messiah, to those who have obtained a like precious faith with us in the righteousness of our God and the Savior Yeshua Messiah:
… ἐν δικαιοσύνῃ τοῦ θεοῦ ἡμῶν καὶ σωτῆρος Ἰησοῦ Χριστοῦ.
We kept the ASV's wording, in modern English, including its "the" before "Savior": "our God and the Savior Yeshua Messiah."
Why
The Greek
τοῦ θεοῦ ἡμῶν καὶ σωτῆρος is "of the God of us and Savior": one article (τοῦ) before "God," and none before "Savior."
The supplied word
The second "the" is supplied in English, as the ASV supplied it.
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It has no separate word behind it in the Greek. Without it, the phrase reads "our God and Savior Yeshua Messiah."
The next verse
names the two with different wording: ἐν ἐπιγνώσει τοῦ θεοῦ καὶ Ἰησοῦ τοῦ κυρίου ἡμῶν, "in the knowledge of God and of Yeshua our Lord" (1:2).
The same construction with "Lord."
The letter uses the same pattern, one article over two nouns joined by καί, in "our Lord and Savior Yeshua Messiah" (1:11; 2:20; 3:18).
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It is the same construction as Titus 2:13.