This may not help with the heel pain, but before I started my first session of chemo back in 2019, one of the oncology nurses advised that I take a broad Vitamin B supplement (B3, B6, B12 etc), as it helps to minimise nerve damage.
I followed the advice, and having had 2x 6 cycles of Docetaxel, I never had any peripheral neuropathy / pins & needles etc. A vit B supplement is cheap and easy to take, and certainly won't do any harm.