Unfortunately, it seems that replacing these earbuds should they get spoilt or if you lose them will be an expensive affair as well. According to Apple’s support page, it seems that if you were to lose or damage the AirPods Pro outside of the warranty, it would cost you $89 per earbud that needs replacing. This will be the same price as the wireless charging case that comes with the AirPods Pro.
However, if there was ever a reason to get AppleCare+, it would be now because Apple will only charge customers $29 for each incident if they have the extended warranty. To give you some context, the AirPods costs $69 to replace each bud out of warranty, so the Pro version will be $20 more expensive per earbud, totaling to $178 if you were to damage or lose the entire set.
We’re not sure if buying extended warranty for a set of earbuds is worth it, but if you think that you might be the kind of person to lose or damage these earbuds, then it might be worth looking into.