Sperm count improved but 0% motility

My husband had testicular cancer 4 years ago but not chemo luckily. We have been TTC for 2 years and unfortunately had a early miscarriage last May. We started getting tested and it turned out that husband’s sperm count was 4 million and motility was 1%, a second test 4 months later now show 11 million sperm count but 0% motility. I just wanted to know if anyone has any suggestions to improve motility, we are based in the UK. We are now waiting to be referred for <a href="https://glowing.com/glow-fertility-program">IVF</a>. I would really appreciate any support from you lovey ladies 🥰