After chemo, my husband had neuropathy in both feet which was agony ,at night especially, he also had severe pain in his legs and knees later on.
He had some trouble with his hands too, losing dexterity.
The macmillan nurse suspected spinal chord compression and he was sent to hospital but scans showed nothing untoward so the pain was probably chemo related but kidney problems caused swelling in legs and feet which was painful too.
I don't think the later side effects of chemo are fully understood. My husband had no problems during the treatment- it was a couple months after it was prematurely stopped due to Covid.