I think we must start by understanding that God sees all things as one..He sees The end from the beginning. He does not see as we see neither does He think as we think "For as the heavens are higher than the Earth so are My ways higher than your ways".
Isaiah 46:10 New American Standard Bible (NASB) 10 Declaring the end
from the beginning, And from ancient times things which have not been
done, Saying, ‘My purpose will be established, And I will accomplish
all My good pleasure’;,
He sees the end, because He determines that end, "My purpose will be established" Why? Because "I will accomplish" !
Before God all things are one..Before the foundation of the Earth, before the creation of any creature, God determined and therefore foreknew and foresaw all things!
To say that *action equates to time is fallacious to the extent that God has always been working, John 5:17-18
17 But He answered them, “My Father is working until now, and I Myself
Before there was any creature, God is and had no beginning. Do you think you can understand that? The creature sees time because he is created and has a beginning. But God, who can look on His face and live? All representations of Eternity, are necessarily couched in time, simply because we cannot understand Gods eternity, as we are not eternal. When John says there was "Silence in heaven for half an hour" that was his perception. God does not see in time as we do. In order to understand "Not having a beginning" we must put ourselves in that place, something we cannot do! The question arises though, whether we will when we see Christ, for then we will " Know fully even as we have been fully known".
So from Gods point of view, everything is one, there is no progression, as we experience life and the created realm.
To answer your question we must first determine what Heaven is. Is it "In His presence forever"?
New American Standard Bible (NASB)
11 You will make known to me the path of life;
In Your presence is fullness of joy;
In Your right hand there are pleasures forever.
We certainly, cannot contemplate what it will be like, as "eye hath not seen neither ear heard neither has it entered into the heart of man what God has prepared for them" ! It is futile, to try and imagine, in fact it could be idolatry to do so!
If time, is the awareness of events passing, of forward movement, then yes we experience this now. But I doubt we will be looking at a clock when we are in the presence of the Eternal God..and I doubt whether time will be an element in that experience, certainly not in the way we experience time now. For now we long to see Him in the future. Time has many emotions connected with it. Regret, longing, hoping and others. None of these will be experienced in Heaven as we will know even as we have been known.
Thoughts of heaven must always fall into the category of, "Eye has not seen-neither has it entered into the hearts of men, what God has prepared for them that love him" ! Time may be swallowed in eternity just as this, "Mortal will be swallowed up in immortality".