If I was working with a child who 'wasn't ready' for formal learning (a construct I believe is in any case fabricated by people who quite simply don't know how to teach) I would be focussing on self help skills-feeding, toiletting, removing and putting on clothes, moving around independently, asking for help, working on fine and gross motor skills, ensuring a functional communication systems is in place.
These can all be considered formal learning however. The child is formally learning how to be as self reliant as possible. The more you can do for yorself, the less reliant you are on the SEN army-and less likely to be abusied or taken advantage of.
I work with plenty of profoundly disabled kids-blind, deaf, largely immobile in somew cases. Not one of them isn't ready for formal learning. Anyone who would use their disabilities as an excuse not to teach them doesn't deserve to be a teacher or a therapist.
A life lived in ballpools and sensory rooms and footspas is no life at all.