I think I lost about 50% of my hair on Folfox, but it was even all over so I didn't have bald patches, thank doG. I found that when it really came out was the post pump shower. Depressing! I am a longer hair person, and no way could I do a pixie, and my head is too big for most hats, so I just went with it and kind of kept is brushed back. It was obvious to me, but not to others. When it started growing back in, I was in danger of having an 80s hair band look, where the top part sticks out and the bottom is scraggly.
A month or so ago I got my son to whack off the bottom six inches, which was noticeably thinner. It's on the wild side, to say the least! Pretty soon I think I'll go and have an actual hairdresser see what they can do.
I admit that it has crossed my mind to be glad that forfiri is not a good choice for me, which is crazy, but don't come between a woman and her hair!
ETA, I bet yours seems worse because its combined with the normal post partum loss. Also, I was told and observed that the folfox thinning tends to more or less stop after the 8th cycle.