I have answered your erroneous understanding of John 17:5 (in light of multi-persons God).
The world is not planet earth but people who are elected to salvation. Read John 17:5 in its context:
John 17:
4 I
have glorified thee on the earth: I have finished the work which thou gavest me to do.
5 And now, O Father, glorify thou me with thine own self with
the glory which I had with thee before the world was.
6 I
have manifested thy name unto the men which thou gavest me out of the world: thine they were, and thou gavest them me; and they have kept thy word.
The Son esteemed The Father on earth (people) - v4.
The Son is asking The Father for the same esteem to be bestowed upon Him before the world was (before His believers were. Not planet or flat earth). - v5.
Now v6 is very clear The Son is speaking about His elect chosen from the world. He is not speaking about eternity past where there was no Father nor Son. The titles of The F, S and HS are salvific in nature and nothing to do with a multi-personal God as you believe in.
1Chron 29:
10 And Dawiḏ blessed יהוה before all the assembly. And Dawiḏ said, “
Blessed are You, יהוה Elohim of Yisra’ĕl, our Father, forever and ever.
If He is The Father of Israel then Israel is His Son. The Son of God is then representing Israel as the firstborn son. What Israel couldn't do, The Son of God did. These are salvific titles and not multiple persons of God.