OP wants Year 8's to be prioritized as they have missed out as a result of their first year of secondary school being interrupted and that disruption continuing into second year.
Sounds fair enough.
Year 7s have also missed out - sats, transitions, leavers trips and shows. They should probably also be prioritized too.
Year 9's - they should be well into choosing their GCSE subjects, but have missed part of their y8 and now y9 experience - they need some of this priority business too.
Year 10 and 11s - missing important GCSE years - they should be well up there for prioritization.
Of course the Y12 and 13s - missing their A-level time - get in line for some priority treatment.
Plus university students, primary school etc etc. All the kids have missed out. All need support. All want to be prioritized.
Picking one year group over another causes division and resentment.
OP seems to resent last year's y6 who got to "go back to finish off primary school". My Y6 child got 2 weeks of 2 day/week in school for this. 4 days. No trips. No parties. No shows. No leavers assembly. If your (then) y7 had got those 4 days in school instead, would you think that made up for the disruption to the rest of their y7?
Priority needs to be given on an individual basis - for those whose mental health has suffered most, who haven't been able to engage with the remote learning, who have lost family members or friends.
Battling it out over whether 11/12 year olds have lost out more than 12/13 year olds is pointless.