Welcome to all the new people, or welcome back if you're returning. This thread is so busy!
Regarding chemo brain or general cancer brain, my own was caused by Epirubicin and Cyclophosphamide which were the first two chemos I was on, for 4 cycles. I was so mentally affected by them at the time I couldn't really understand speech or function at all. My brain felt appalling.
I was on paclitaxel and abraxane after EC chemo, but my brain started to improve somewhat on those; they didn't seem anywhere near as brain-toxic for me personally.
I didn't notice any effect on the brain from surgery, radiotherapy or the 18 cycles of two monoclonal antibodies, but they may have contributed somewhat without my noticing.
I enjoy my job, but it does need my brain to be functioning well eg analytical skills, general critical thinking, problem solving, creativity, communicating with people, etc are all needed. I finished EC chemo in the late summer of 2022. I'm starting to lose hope I will ever have my former brain back, and will need to see if I can do my job well enough. I'm years off the retirement age. My job are happy for me to start back part time in the new year. I'll try and see.