GrapheneOS is both, it is a privacy and security focused OS and would encourage reading of our documentation at grapheneos.org to dispel any myths.

As far as the other mentioned OS I have a previous note you can refer to here:
 nostr:nevent1qqsp9we4l0g8jwh3rqqx3ud0gfh603gxr5cekfn92v4qxqzl95a8njgpz3mhxue69uhkummnw3ezummcw3ezuer9wcpzqsmr0gc35903cffmt4s80z4h239vvwdc3ctguu3y4yqdffqjsvvrqvzqqqqqqygxk7yw

Also reference this comparison across relevant feature sets...

https://eylenburg.github.io/android_comparison.htm 

 Is there a good FOSS keyboard? the one I have has weirds issues when using Amethyst when deleting words and whatnot. 

 Ya the native keyboard is terrible with Amethyst. I’ve had good luck with FlorisBoard 

 https://github.com/florisboard/florisboard 

 Working like a charm. Ty 

 You got it 

 I use Florisboard for swype functionality okay, most AOSP based keyboards unfortunately have the issue.