Q: Through our Lord Jesus Christ, your Son, who lives and reigns with you in the unity of the Holy Spirit,
God, for ever and ever.
Question 1: The “God” in the third line, is it referring to Lord Jesus Christ [mentioned in the first line] OR is it referring to God the Father? Or is it referring to all three persons?
Question 2: “For ever and ever” in the third line, is it referring to the forever-ness of the second line OR is it referring to the forever-ness of God being God always?
==
A: Here’s a previous post: https://paulturner.org/god-for-ever-and-ever/
IMHO, the expression “for ever and ever” refers back to “lives and reigns.”