Personally I don’t think kids need to “catch” up with their maths or phonics or fronted adverbials, but with outdoor activities, team sports, leisure activities with their peers - being kids.
But that’s just my opinion.
It's mine too.
Some children will need to catch up academically although, in my limited experience of DGC and teachers in the family, schools and teachers have done an excellent job in ensuring that academic work was set, marked and assessments made.
They have missed out on so much more which schools offer such as sports, drama, art, music, outdoor activity holidays etc. and some children will only ever experience these through their schools.