Most things a Dom will let Thier submissive know but there are something's a Dom will not talk about, it is because they can not that they are weak . Which when you think about does not make sense as we try to teach our sub that admitting to something makes you strong and a good person .
I suppose the biggest one is submissives need aftercare well most it is the same for a Dom after planning a play session get it ready and actually playing like a sub we Doms gi into our own space , so after play we to need after care but in different way such as the submissive serves her Sir with drinks I like my neck and shoulders rubbed. Having my day she is proud off her Sir for a great play session .
There are even little things more for the newer doms especially when he has a newbie submissive he tends to over think things such as an I hurting her what do I do next and the bid one is she happy with the play puts stress on newer doms , so submissives understand your Dom and realise he is human to .