No, dark mode is not working. When I open a website it’s turned off even though I leave it turn on all the time. To fix this issue I have to then turn off and turn on, so the website will after that appear to have a dark background.
Here’s proof, dark mode enabled and I visit for example CNN
First image of how the site appears to me
https://i.postimg.cc/pTxRVg2F/23-A13-CF6-81-B0-4837-95-DF-31275-CA5739-F.png
Now look at the proof dark mode is already enabled
https://i.postimg.cc/9Fv3FvbQ/3-C98893-E-E1-F0-4-B5-F-A58-B-9-AAD58-A02-F47.png
And what happens when I disable it
https://i.postimg.cc/L83MCxk4/0460-DD0-E-09-F2-43-D2-8-A24-C37-C455-A006-D.png
Finally look what happens when I re enable dark mode
https://i.postimg.cc/BnMVPkcF/BD0-FE50-A-51-B0-483-D-93-EE-290927523502.png
The last image is how CNN should have appeared to me when I visited for the first time.
Is that clear now? It wasn’t like that before. They messed with this feature just like they did by hiding favorites.
And this dark mode issue also happens with iOS 13.
I am using iOS 12.3.1 and the iPad Pro 10.5.