No one can be in the Tent of Meeting from the time Aaron enters to purify the Most Holy Place until he leaves, after he has made things right for himself, his household, and all the Israelites.
For Christ hasn't entered a Most Holy Place constructed by human beings that is only a pattern of the original. He has entered heaven itself, and now appears on our behalf, speaking for us in God's presence.
Then another angel came and stood at the altar. He had a golden censer and he was given a large quantity of incense to add to the prayers of all the saints on the golden altar that stands in front of the throne.