Android shouldn't be considered Open Source anymore, since source code is published in batches and only part of the system is open, with more and more apps going behind the Google ecosystem itself.
Maybe it's time for a third large phone OS, whether it comes from China getting fed up with the US and Google's shenanigans (Huawei has HarmonyOS but it's not open) or some "GNU/Linux" touch version that has a serious ecosystem. Especially when more and more apps and services are "mobile-first" or "mobile-only" like banking.
If Trump ordered Google, tomorrow, to put some egregious measure in place in Android (or Chrome, or Google Search), I, personally, would not want to bet that they would refuse him. And frankly, I don't know that I can even imagine the kinds of things he might try to get them to do.
We absolutely need better competition in smartphone OSes—we need it across the board in tech, really, from a wide array of countries.