There is, usually, a gap between beaurocratic theory and front line, and between, as mentioned by other posters, a can-do attitude with innovative flexibility, and the rest.
There's a wealth of potential labour force for extra teaching, and even one to one tutoring, and some of it would be gladly offered free, and always has been.
e.g. a child social worker has taken early retirement, but she always did like to go the extra mile for some disadvantaged or disabled children, so she is continuing with over-the phone or online reading and just paying attention, to take pressure off mothers. She says that earlier in her career, social workers and care workers did have a 'Sit by Nelly' scheme, where full time workers were 'shadowed' by trainees and volunteers. It is perfect if a care worker can fill in paperwork while an assistant makes the tea and a volunteer makes phone calls and gets shopping, or if the teacher can delegate some follow up work to an assistant, online or at home.
Since invention of technology, (or even Open University) it's time to forget the centuries old idea that teaching must be what gets done to children or teenagers in a year group, in a building, in certain hours and certain term times, with everyone expected to be talked at, and to learn at the same pace.
People are unemployed, people are retired (some from age 50 to 100), people are working part time, people are at home because they or someone else is disabled or is shielded, people are trained teachers burned out, disillusioned, or simply scared of attack in classrooms, or keen to teach but frustrated by the inability, in old style classrooms, to pay attention to the different needs of the advanced and the struggling pupil, while one or two troubled children are out of control.
Children, meanwhile, are sometimes (often) scared of bullies in traditional school settings. Sometimes teacher is scary, sometimes, teacher is scared. A child with chaos at home, or who has disability, can be pleased to get to a classroom, or instead can be disadvantaged by it.
On line and traditional, Dual school must be a potential gift in many ways