CachyOS Hello doesnt start with dark theme in gnome.

Previous issue: https://github.com/CachyOS/CachyOS-Welcome/issues/152#event-21483376224

Solution suggestion is open-ended.
> From the tweak utility, manually, or other GNOME-related utilities

Cause of insufficiency at solution suggestion in my issue i am reopening this.

This issue contains two parts:
1- This application doesnt start with dark theme when gnome's dark theme already selected, thus it has a bug.
2- I cant see an option to set cachy os hello start with dark theme.

My solution offers to developers:
1- Application should start in dark mode if gnome theme is dark.
2- If i need to fix it as manual, i request a detailed solution suggestion.