

Do you mean phones without unlocked bootloaders ? errrrmmmmmm you can’t
Check the LineageOS device suport list : if your device was ever supported, you cand build for yourself (provided you have enough horsepower), or request an unofficial build in the iodéOS forums
No, I am referring to iodéOS.
iodéOS official supported devices
I had asked here - feddit.uk/post/49734939
The models below are officially supported by the iodé team. Don’t see your device in the list? Don’t panic! We also support a iodéOS GSI. You can also find here a list of unofficially supported models by the iodé community. iodé is an open source community project, and relies heavily on your contributions!