I wrote an app that allows you to apply icc profiles to any Apple vendored display (even the MBP built-in screen), and keep them applied across reboots, standby/wake etc. You can find it here: StudioICC
It's not for creating the profiles like the old macOS calibration tool did, it's only for applying already calibrated icc files like the ones you get from SpyderX or X-rite colorimeters.
The app is a bit on the expensive side, as I'm working on integrating with the ambient light sensor of the colorimeters to automatically switch profiles. But the 14-day trial should be enough to help you understand if it's what you need.
It's not for creating the profiles like the old macOS calibration tool did, it's only for applying already calibrated icc files like the ones you get from SpyderX or X-rite colorimeters.
The app is a bit on the expensive side, as I'm working on integrating with the ambient light sensor of the colorimeters to automatically switch profiles. But the 14-day trial should be enough to help you understand if it's what you need.