By June 30th, Google writes, it will lower most app store fees in the US, UK, and European Economic Area to 20 percent or less, down from 30 percent. By the end of the year, it will launch a “Registered App Stores” program outside of the US, so that you can download and install third-party app stores (like the Epic Games Store) from the web without the friction that Google erected previously.
https://www.theverge.com/policy/889252/google-app-store-fee-reduction-20-percent-epic-v-google