I found the following after a bit of searching. I'm sure there's more work being done.

https://www.canada.ca/en/environment-climate-change/news/202... Applied Quantum Materials Inc., in Edmonton, Alberta, is developing a specialized reinforcing additive for tires to minimize microplastic release over different road and temperature conditions. Nova Graphene Canada Inc., in Dartmouth, Nova Scotia, is developing a graphene-enhanced rubber that could reduce tire-wear shedding and extend the life of tires. Stema Punch and Die Inc., in Cambridge, Ontario, is creating specialized compositions for tires to improve their wear and help stop the shed of microplastics.