_jis_I know it used to be there in developer options. With regards to stock apps, I guess I was referring to "apps" that have icons in my app drawer. I don't see any of those you mentioned there. I didn't scour all of the settings menus, but it sounds like there are other areas too based on what you're saying. It does work in the sound recorder and mobile manager apps. For my use, I'm fine with the way it is since they fixed the phone app. For me, it pales in comparison to the lack of voLTE here in the US.
As opposed to a manual switch (which we already have)
Previously, we had the option of automatically switching the theme in the Developer settings on Android 9. This unnecessary issue hurt even more when we lost this automatic option on Android 10.
I think android 11 will improve this
Yes, Google has promised it, so we have to endure until the end of the year.
the only apps that Tasker currently can't control dark mode with are the stock apps for calculator, clock, gallery and file manager
Unfortunately there are much more Asus stock apps with this issue, like for example: Smart key, Game Genie, Twin Apps, Safeguard, Screen recorder, Splendid, Status bar icon manager, Emergency broadcast, Notification sound, ... this issue is scattered over system like plague in all Asus add-ons.