For the readers, when Jesus said in John 20:17 that his God and the disciples God is the Father, in the Greek the manuscript utilizes "my μου (mou) God Θεόν (Theon)" meaning Jesus was referring to the definitive Lord God Almighty.
In the Greek, when the writers represent God with Theon as opposed to "my μου (mou) God! Θεός (theos)" it shows awareness that theos is a distinct usage of a form of god or something/someone that is godly, the same word sometimes used of the devil and other beings lesser than Lord God Almighty in the Bible.
Compare this to John 1:1 where there are two uses of God in the first verse. The God is ton Theon while the Word as a god is simply theos. This once again shows awareness of the distinction between The God and a god.
Therefore, another way to understand John 20:28 is that Jesus is a god or is godly, but not The God.
Either way we look at John 20:28, there isn't a path for Jesus to be Lord God Almighty.
Furthermore, the Bible clearly demonstrates Jesus (the Lamb) isn't the Almighty.
Revelation 21
22But I saw no temple in the city, because the Lord God Almighty
and the Lamb are its temple.