Yes, when it was a lockdown, I read a lot of articles that now students of all ages have worse results. And it's understandable because it's not that easy to get used to the new educational process, it's very stressful, and so on. It was also hard for me, and my grades worsened too. And it took me a while to "recover," but I managed to do it. Now I also face problems sometimes and cannot have that good grades, but it's because of the number of tasks I have, and each of them takes a lot of time. But during the pandemic times I used a lot of extra sources, so now I know a lot of them and can use them at any time. Now most often, I use this tool
https://fixgerald.com/, which is the best plagiarism checker I've ever used. This year I've been working on different papers, and I need such a checker to be sure that I'm not using plagiarism. What I also like is that all grammar mistakes and plagiarism-risk sections are highlighted, and I can correct each. That tool helps me to keep my academic results at a high level.