To the topic of the OP. Jesus ascended into heaven to be with the Father. TimothyH answered this early on. Jesus was enthroned and was placed on the judgment seat and serves as intermediary to the Father. He continues to do the Will of the Father by Praying for us in heaven just as He had on earth as our High Priest and cleansing us of our sins. He did not leave us though, He is just as present to us as the Holy Spirit, that is because, Jesus and the Holy Spirit and the Father are one and calls us into communion with them in heaven… Jesus calls us to a greater purpose and that is to serve the Lord God by serving others, this is Gods will for us on earth, in heaven it will be Gods will for us to pray for others… On earth as well as in heaven.
To say that Jesus left so that the Paraclete can come would be to say that Jesus left and didn’t remain with us. Jesus remains with us as He promised. The HS is not the only teacher and advocate. Jesus Himself is our teacher and Advocate who lives to make intercession for us in heaven… It is written in this scripture.
Hebrews 7:20 This was confirmed with an oath; for others who became priests took their office without an oath, 21 but this one became a priest with an oath, because of the one who said to him,
“The Lord has sworn
and will not change his mind,
‘You are a priest forever’”—
22 accordingly Jesus has also become the guarantee of a better covenant.
23 Furthermore, the former priests were many in number, because they were prevented by death from continuing in office;** 24 but he holds his priesthood permanently, because he continues forever. 25 Consequently he is able for all time to save those who approach God through him, since he always lives to make intercession for them.**
26 For it was fitting that we should have such a high priest, holy, blameless, undefiled, separated from sinners, and exalted above the heavens.
So the way to heaven is through Jesus who is in heaven…Jesus being the way and the truth and the life, ** John 14:6 Jesus answered, "I am the way and the truth and the life. No one comes to the Father except through me. **
Jesus drawing us up to the Father from His heavenly throne where continues to do God the Fathers will by praying for us…Imagine Jesus praying for us while on earth…Then imagine Jesus still praying for Us only from the heavenly heights where our hearts are lifted up to when Jesus is lifted up on the altar… If Jesus never ascended into heaven, our souls wouldn’t be lifted up, it would stay on earth with Jesus… No, Jesus needed to be lifted up to heaven in order to have our minds, heart, and bodies lifted up to heaven towards Him… Because as Jesus is lifted up He draws men to Him…
John 12:32 And I, when I am lifted up from the earth, will draw all people to myself."
And as St. Paul says… Colossians 3:2 Set your minds on things above, not on earthly things.
We should always direct our minds up to God… That’s why Jesus ascended into heaven, He showed us the way to our heavenly home with God as Our Father in Heaven…
I hope you all don’t mind me writing so much but so much of this is going through my mind and I feel compelled to share…

God bless you all and May Christ give you His peace…! +++