Hi everyone, hope you're all doing well

I submitted my appeal a few weeks ago (I know it'll be a while) so still haven't heard about the DWP's decision.
I recently had a neurology appointment which has confirmed some of the symptoms I have been having and other tests that are going to be done; is it worth sending this off as extra evidence? It's about the symptoms I've been having since I applied back in January, mainly weakness in my right arm and hand which makes some of the activities harder without assistance. I also have my GP notes from the last two years now. Would I send this to the Tribunal Service or to DWP themselves?