God’s omnipresence

While Jesus was physically present on earth, was he at the same time omnipotently present outside of time?

I am understanding your question to address Jesus’ state of humiliation—that time in the Lord’s earthly life when he laid aside the full and constant use of his qualities as God (Philippians 2:6-8).

At all times, the Lord’s omnipresence is a reality. Sections of the Bible like Psalm 139:7-8 and Acts 17:27-28 provide that information.  This is certainly true regarding Jesus’ state of exaltation (Philippians 2:9-11).