FWIW, I do think this cohort have been significantly impacted- especially Y13. They came up to A-levels/level 3 with really disrupted GCSEs, and loads of gaps, so they've had an awful lot to catch up alongside the course content. I disagree last year was a standard year- many schools were still having adhoc closures due to lack of staffing, or sending year groups home in the autumn and spring terms especially.
Y12 were also a popular choice to send home, as it was assumed they would study from home- or sometimes they were in school but off timetable/having lessons cancelled due to staff absence.
I wouldn't be against pinning their grade boundaries to 2022, as a mid step between the advanced information (which has caused problems with transition to level 3, too) and going back to pre-covid standards.
However, if less people get the top grades, unis and colleges will still want to fill courses. So they will just drop entry requirements on results day until they have let in the number of students they want. In the long term, it may not have such a detrimental impact.
That said, these students will be competing with students from last year who took gap years, for uni places and grad schemes and so on, so it does put them at a bit of a disadvantage.
I don't know what the answer is, but unfortunately, I doubt anything will change now! It's probably best to focus on supporting your DCs?