Heb 10:12 But this Man, after He had offered one sacrifice for sins forever, sat down at the right hand of God,
Heb 10:13 from that time waiting till His enemies are made His footstool.
In this verse, Jesus is described as ascending to heaven and then “waiting” for the time his enemies will be “made his footstool” (an idiom for being defeated or subjugated). Not only does this counter the idea that God is controlling all things (his enemies are not subjugated, but rebellious to God), but it uses the language of duration. God waits.
This would be odd language if the author believed God is timeless. God would already be in that time for which He is waiting. But not Biblical hints are given for any realm of timelessness. To the authors, God experiences duration.