In emacs-macport, only switches to dark theme when Dark Mode is toggled

[what-the-functor]

If emacs-macport is launched when Dark Mode is active, the theme is not switched to the dark theme. However, if I toggle Dark Mode (off, then on) the theme is switched.

The emacs-macport hook mac-effective-appearance-change-hook is set to auto-dark--check-and-set-dark-mode. This is working very well, though only when Dark Mode is actively toggled.

The aforementioned hook is not invoked when emacs starts, so there should be a mechanism at startup to check and set the dark mode. In my configuration, I've solved this by adding auto-dark--check-and-set-dark-mode to emacs-startup-hook, though there is a flash of the light theme. I think that the flash of light can be avoided by utilising before-make-frame-hook in early-init.el.