I was born blind, so this is just my experience interacting with others who lost their vision later in life. It's likely your friend will want to focus more on

I was born blind, so this is just my experience interacting with others who lost their vision later in life. It's likely your friend will want to focus more on counseling and therapy to adjust to the fact that they will be totally blind in a short time. Instead of figuring out if Voiceover on Mac OSX or NVDA with Windows and WSL is better they should get the help they need to figure out how to do all the daily things they used to. How are they going to be able to cross streets, go out to a restaurant or bar on their own and navigate around, etc. How will they match clothes, cook without being able to see the stove or microwave, etc. All these things are possible although with the lack of info on your friend's location I have no idea what government or private support there will be for this kind of rehabilitation service. NVDA with WSL2 and VSCode is what I use for development, Mac OSX and XCode was a garbage fire last time I tried it four years ago. Some of that may have been the fact that I was not nearly as comfortable with Voiceover but Apple made no effort I could see to interact with the accessibility community at that time. My understanding is that iOS development is more accessible with Swift UI but I"m not spending $1000+ for a secondary computer to try it out.