Yes. I just replaced the ones in my wife’s Sony earphones by following a step by step guide on ifixit. Cost me $15 for the batteries including shipping, and they’re not even any sort of exotic type or size.
Edit: okay just read the article. Guess these are a lot more convenient to replace than the Sony ones.
My hot take: does it matter? How often do people actually need to replace earbud batteries? I’m guessing it’s almost never.
Every 2-3 years in my experience, I’m on my 5th or 6th wireless headset in the last decade, and most of those were replaced because the battery life went to shit. And I’ve tried multiple brands with no material differences in overall life, but I also use mine throughout the day every day and regularly wear them until I’m forced to charge them.