In Gutenberg post editor, every block comes with an Advanced field where you can add the HTML anchor and Additional CSS classes. The Advanced field is closed by default and requires multiple clicks to activate it. This module simplifies the process and allows you to open the Advanced field by hovering your mouse above it.
Activate Auto open Advanced field in Gutenberg on mouse hover Module
In the Admin Optimizer page, click to enable the Auto open Advanced field in Gutenberg on mouse hover module. Press Save Changes to save the changes.

No configuration is required for this module to work.
Usage
In Gutenberg post editor, select any block and hover your mouse to the right panel. The Advanced section will open automatically.
