Voxel provides a default email notification template that is used for all email notifications
The template adds default site logo from WP admin ➝ Appearance ➝ Customizer
It uses the Accent Color from Elementor global settings.
Other details can be configured in general settings
To override or make changes to this template, you can install Voxel child theme
Copy the following file from main theme to child theme
Then edit the file in the child theme and proceed to apply your changes