None of the Airpod Pro tips fit

Do a google search for "AirPods Pro ear tips" and you will find other third-party solutions such as:

https://www.amazon.com/Proof-Labs-AirPods-Covers-Compatible/dp/B0844WPDY5/ref=asc_df_B0844WPDY5/?tag=hyprod-20&linkCode=df0&hvadid=416875525560&hvpos=&hvnetw=g&hvrand=7194180850309967393&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9007782&hvtargid=pla-869735759973&psc=1&tag=&ref=&adgrpid=100759324264&hvpone=&hvptwo=&hvadid=416875525560&hvpos=&hvnetw=g&hvrand=7194180850309967393&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9007782&hvtargid=pla-869735759973

or (xl sizes):

https://www.gearpatrol.com/tech/audio/a726852/airpods-pro-comply-eartips/

I have the same problem with AirPod Pro. After both pods fell out of my ears at the same time in a parking lot and one got ran over and crushed, I bought ear hooks from Proof Labs. They work very well in keeping the pods in my ears, and are comfortable. A pain, however, because I have to take the hooks off to put the pods in the charging case. Yes, I did buy the warranty plus, so Apple replaced the damaged pod right away, after a sizable co-pay.

Return them for a refund, you only have 14 days.