I'm autistic and have ADHD, both of which I told my MSc supervisor about when I started working on my MSc thesis. I believe this led to him making an extra effort to be clear in his communication with me, and he also supported me by helping me plan my work in smaller chunks and having intermediate deadlines. If there are specific, actionable accommodations that you would like to request, and you believe that disclosing a disability would provide context for why you are making the request, then I think it is worth disclosing.
In general, I would not disclose to try and make people view past behaviour more positively, unless you can also point to something that has changed since and the steps you're taking to address it, as it is likely to just come across as making excuses.
You might want to say something like this: "I know we've had issues with miscommunication, and I've noticed a pattern of us coming away from meetings with different understandings of what we discussed. I've realised that this is due to [specific disability], and am working on strategies to improve this. I want to start taking notes during meetings, which might mean I need to pause to write during the meeting. I would also like to email you a summary after the meeting, which should hopefully make it clear if I have major misunderstandings of what we discussed."
You are acknowledging the problems, explaining the cause, and explaining the steps you will take to address it. This is the kind of conversations I've had with my supervisors about my disabilities. They have actually praised my communication skills recently, I think in part because I have acknowledged what the problems are and have taken steps to make sure we have a shared understanding of anything significant.