I'm sure you did your research. I'm writing for other readers who are interested. There are a few alternatives, more can be found but this is a selection of th

I'm sure you did your research. I'm writing for other readers who are interested. There are a few alternatives, more can be found but this is a selection of the most prominent offerings. /e/OS: https://e.foundation/e-os/ https://e.foundation/e-os/ GrapheneOS: https://grapheneos.org/ https://grapheneos.org/ LineageOS: https://lineageos.org/ https://lineageos.org/ CalyxOS: https://calyxos.org/ https://calyxos.org/ PostmarketOS (based on Alpine Linux rather than Android, and what's used in Pinephones): https://postmarketos.org/ https://postmarketos.org/ (for some reason the site is currently down)