Changes won't come about as a result of this child's death @homemadecarrotsoup
The provision for SEN children is scarce during holidays. Parents often have little choice. Many don't work, or have term time only jobs, as there is so little appropriate childcare.
The councils/companies don't offer SEN spaces, as they cost too much to staff. The families I work with get a PA budget if they've fought really really hard for it. That way, the family get some childcare 1:1. Often though, this is only up to 10 hours a week.
Caring for a SEN child is expensive. That's the reality.
And finding a suitable childminder with availability for a non verbal 7 year old is hard. Finding them on FB? Probably not the best decision tbh.