I remember using an adjustable mouse for a while. Where I could make the external of it larger and I could add weight to it or make it lighter. There are a few kinds that come to mind and they are expensive when I remember seeing them. The one that has adjustable pa else and the other was more like a joystick but wasnt...will try to link it..
https://www.google.com/shopping/product/16509089215970732779?q=logitech+mx+vertical+advanced+ergonomic+mouse+910-005447&utm_medium=tu_cu&utm_source=tu&utm_content=eid-lsjeuxoeqt&utm_campaign=125181302&prds=epd:12450846362515024874,oid:12450846362515024874,prmr:3,cs:1
Logitech MX Vertical. Newer version of what I was thinking about.
Found an article...I dont know if you've read it yet, but seems like a decent read.
https://www.windowscentral.com/best-gaming-mice-big-hands