Here’s my dramatic answer! I’ve had cancer twice, same medication you mention and always had thick, long, and later shoulder length hair. I’ve had sewn in extensions to match my own hair colour, but am having a rest from those now and have a selection of clip in extensions (I use hair grips as well to make it really secure) I do like the halo extensions available online as it’s just on a nylon wire, again I use extra clips. My daughter was a hairdresser and she trims them for me as I don’t want hair down to my waist. John Lewis have a good selection. I also use half wigs. I truly feel glamorous and more like myself wearing them. Yesterday for the first time, I wore a baseball cap which comes with hair attached! Sounds bonkers, but the hair is cut in a neat bob style and looked great. I have just ordered a different colour cap. Online and not expensive.
Kerastase is the best shampoo and conditioner, not cheap but good.