I have a Google Play account. I have about 4 out of 25 Android games published there - the others are unpublished.
The others are unpublished because I find the updating requirements cumbersome. It takes about a month to update all my games to the latest Android version and retest them. That's not practical because I'm not doing this full time, I have a day job. I don't sell enough games there to justify this update requirement either (because I don't have the funds to market the games).
Google Play's privacy policy requirements are also nuts. They need a dedicated page that is bot-readable. To create all of those, when I'm not tracking my users at all just seems a step too far.
People don't often buy / download my Android games here on itch.io.
I have a little success with Amazon.com - although recently someone pointed out to me that despite my games being published everywhere Amazon has stores, they're not available to download or play in other stores (possibly because they're not translated to that particular language). But I have more downloads and sales at Amazon and Huawei than at Google Play.
My games with IAP are not published at Google Play because I don't have the knowledge or resources to block all these spam apps that bypass Google's IAP and unlock the games for free. It's funny how Amazon, Huawei, and Samsung will all make the effort from their side to protect developers. Google will not.