The effects of the pandemic have been particularly awful for all those going through developmental stages, so children and young people up to mid-20s. Also, older people, people with disabilities, some ethnic groups etc etc.
But to focus on children and young people... it's all been done now. Learning for the future (hopefully never to be needed...) yes, but arguing over should haves and could haves is pretty fruitless.
What needs to happen is large scale social adjustments and investment to nurture these children and young people, to try to make up some of what they've lost.
So, the school curriculum being massively revamped to focus on social and emotional skills, and those relevant for the 21st century, rather than the outdated 'knowledge based curriculum'.
Massive investment in early years and teaching staff so that the people looking after and teaching our children are well themselves.
Adjustments to FE and HE to give young adults more time to just be young adults.
More apprenticeships, more access to decent housing etc.
Lots of things that could be done now, if we have a government that gave a shiny shit about the welfare of the ordinary people of the country.