See if the Graphene team supports the 10 when it comes out. If it does then get that and if they don’t then get the Pixel 9 at a discounted cost and put on GOS. Then wait and see what happens with the situation.
Calyx is okay but MicroG doesn’t work nearly as well as GOS sandboxed GPlay. eOS tends to be multiple Android versions outdated. I’d go with GOS, Calyx, Lineage, then eOS.