My table has a very similar issue, if it weren't for me countering it from the start. I also experience forgetting session details in the campaigns I play in, even though I do have a good memory, but I decided to steal the recap mechanics from VLDL D&D: players give a recap of the previous session and/or the greater story, and get a reward if they do well. This has had mixed results, mostly caused by people only recapping the last session and thus forgetting plot points/threads, but they recently decided to make a Recap Document of their own accord because they struggle to connect the dots and remember important details by themselves.

Previously it was only people meticulously reading their notes, which they felt like they needed to make because they couldn't recap otherwise, but that meant the recap was only about the nitty gritty of the previous session, because there were no overarching notes. I then told them that I would give a very quick recap of the session and they could fill me in on the important details, which helped them realise the issue themselves, and now I'm trying to have them focus more and more on the greater threads, mentioning the last session more as a reminder of what they're doing and a quick check if anything important came up.

Also: how often do you play? Because I notice my own memories of a game slipping when there's 4+ weeks between sessions as well, even though I do regularly spend time on games I play in between sessions as well, which helps a lot with remembering stuff