I have OnePlus 7 Pro that I successfully flashed with LineageOS 21 with MicroG. Do you have some interesting apps or ideas to take advantage of it? I thought of some Magisk modules. Maybe someone is more experience than me! This is the spare smartphone, the main one is GrapheneOS, so I don’t mind breaking stuff.
Someone suggested to me the other day that safetynet was now (or will soon be) deprecated. I’m not sure what the situation is with regards to attestation, though I sort of dread to think about what will replace it.