Is it acceptable that the only access to a service panel is through a master bedroom closet?
As long at the panel is not in a bathroom, clothes closet or on a stairway the panel would be ok with the required working space 30" width or width of the panel if wider than 30" and headroom it would be legal if accessible. I realised I did not specifically answer your question. Yes your service panel can be in a room that is accessible and yours is accessible (and not in a prohibited area).