@sphera
I read all in your post as feature request:
Change default menu entries
Change default settings
The developer can read anything, they just not can spend time to read regular posts.
Some developer does this, mainly in the mail section but the feature requests are actively watched from the Vivaldi team.
This not a secret.
Iirc there is a request to customize the menu like on desktop, this would help anyone I guess.
It has 9 user votes since 2021 so it seems not many really need this.
https://forum.vivaldi.net/topic/68161/customizable-menu-items