Another hurdle to jump is if your source master is 23.976fps (or 29.97fps) instead of 24.00fps (or 30.00fps). DCP must be integer frame rates (like film) rather the fractional video frame rates used in North America. Resolve will not automatically make the proper conversion. You can easily have Resolve reinterpret the frames at 24.00fps, but getting the audio correct is a challenge that has required using Reaper (or similar tool) to make sure the retiming didn’t shift the pitch at all. Perhaps it’s now possible to retune the audio properly in the new Fairlight Page, but I couldn’t say for sure as I haven’t tested it.
To get around the hassle when I’m dealing with fractional frame rate masters, I just use the free tool DCP-o-matic.
https://dcpomatic.com/I was introduced to it by a friend who owns a movie theater. The silly name had me skeptical, but it works well, it handles the frame rate conversion flawlessly (without any frame interpolation) and it even adds proper naming and padding to make sure your frame size sits inside a DCP spec size container. It also gets the color transform correct from the color space and gamma the image was mastered to (and you can even enter in custom coordinates for non-standard sources).