A-levels are most likely NOT being cancelled this year, forget next year. And content was not made easier on students who gave the October exams despite being cut off from school after closure was announced in March.
2021 exams will only be helping students in the most minimal ways; guidance on topics (tbh useless when everything literally comes up in the exams) and grading being more similar to 2020 grades, because otherwise it will be horribly unfair.
I guess you've just started A-levels and are probably finding them hard, maybe you've finished mocks and gotten your results back? Listen, you have a lot of time and can still get amazing grades even if you flopped them, I guarantee it. Use Christmas properly and keep things consistent, and you'll do well. If this is not the case, apologies for making presumptions, but it's something I've seen a lot of students going through.