I actually have a similar routine a lot of mornings😥 But mine are just turned 5 and 7.
I can empathise with the OP, when you're busy and have a full day ahead of you, and the people around you don't want to get up or focus on getting ready, you end up taking on more and more tasks with the intention of making the process smoother, but then you do become relied upon.
And with younger DC, no one is going to turn around and blame a 5 year old for being late for school. So I can imagine you get used to the pressure being on you to make sure kids are on time. I always find it so much easier in the summer, they've naturally so much more get up and go.
OP if I were you, I would have a discussion, they're old enough. Say you will help them by laying things out the evening before, but alarms will be set and it will be up to them to dress etc. If they don't like to get out of the warm covers, hang dressing gowns by their beds, or if you're passing them clothes anyway, lay them out on bedside tables/end of the bed hangers or whatever.
I'm nor a naturally organised person so I do my best to get as much possible ready the night before. Life feels pathetic when your morning comes to a halt because of one misplaced PE plimsol!! So do what you can the night before.