I still remember everyone talking about how Android was so much better because it was "open source". And for a while, that was true. Now it's just a free gateway into having your freedom has a user taken from you, because no one ever bothered to make Android an actual FLOSS community like Linux and many programming languages are.
You need to have an actual ethos behind these things. You need to have an actual foundation organization behind these things like the PSF, FSF, or Linux foundation that drives the development, not corporate overlords who have a profit motive.
The people involved need to understand that they're not going to create untold amounts of value that can be measured monetarily. At best you might get hired as a fellow for a while and get to draw some money from donations. Linus only got rich because some very generous people offered him shares after they built a company on his project.
I think (free / libre) Android is still alive today (although it is endangered now with Google not yet having released Android 16 QPR1. I would still hope with enough contributors we could fork it). Forks like LineageOS/GrapheneOS exist, which further improve allow you to use Android completely without proprietary Google Spyware. There is also a quite big ecosystem of free open source apps (on FDroid and other repos)
The problem isn't that there's no free/libre Android, it's that it's not the core ethos.
15-20 years ago, someone at Google thought, "Jeeze, these little smartphones are great, but they could be better, and imagine all of the data we could get off of users if they did everything in their lives with one?", so they bought into Android, which was a completely independent startup until 2005. That is the platform's raison d'être. They wanted to compete with PalmOS, Windows Mobile, and later iPhoneOS, for the data that people were entering into smartphones, so they introduced a software product that was open source so that OEMs would buy in. And it worked.
Android would not have had a use to Google as a GNU/Linux-style project where there is no gatekeeper. If I can easily tear out Google's proprietary software, and replace it with something else without losing access to things like the Play Store, then Google just lost out on the value proposition on their purchase of Android in 2005 when it came to my use of it. They did it to make money off of my use, not to graciously support a FLOSS project.
And now we're seeing that playing out as all of the FLOSS projects you mention are under direct threat from Google's handling of the project.
You need to have an actual ethos behind these things. You need to have an actual foundation organization behind these things like the PSF, FSF, or Linux foundation that drives the development, not corporate overlords who have a profit motive.
The people involved need to understand that they're not going to create untold amounts of value that can be measured monetarily. At best you might get hired as a fellow for a while and get to draw some money from donations. Linus only got rich because some very generous people offered him shares after they built a company on his project.