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