Apple has some confusingly-similar names here, and multiple product generations.
EarPods (from the original posting title, and the posting text) are wired earphones, and don’t have replaceable tips.
AirPods are wireless earphones, but don’t have replaceable tips.
AirPods Pro are also wireless earphones, and do have replaceable tips.
AirPods Pro have a couple of generations, and the tips are not interchangeable. (Pick your size, too.)
1st: AirPods Pro (1st generation) Ear Tips - 2 sets (Medium) - Apple
2nd: AirPods Pro (2nd generation) Ear Tips - 2 sets (Small) - Apple
Here is how to identify the AirPods or AirPods Pro model: Identify your AirPods - Apple Support
If you have AirPods Pro, here are how the tips work: Choose your AirPods Pro ear tips and use the Ear Tip Fit Test - Apple Support