Please tell us some basic information before asking for help:
Model Name: Rog Phone 3
Rooted or not:no
Frequency of Occurrence:
APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
Why there is no facebook dark mode on ROG phone 3??