Although iPhones have good security, I don't like the idea of potentially being forced into stuff because Apple controls the entire ecosystem.
I'm considering getting a Moto G86 Power and debloating the unnecessary stuff with: https://github.com/Universal-Debloater-Alliance/universal-android-debloater-next-generation
Good news is that Motorola generally ships a reasonably clean phone and the hardware looks way more resistant than most Pixels. I guess the most important would be removing PlayStore, installing Aurora Store and Obtainium. Not sure if it'd work well yet, but if I can decide when to turn on/off Google Play Services, that'd be great.
Since the method above doesn't require unlocking the bootloader, I think it will preserve decent security for most of the situations.
It won't have the security of GrapheneOS, but I believe it will be more private than an iPhone and more customizable too, needing to put less trust on any company.