Gallery Block Spacing not apply to the page

The issue stemmed from a missing library, which was resolved by reinstalling the module using Composer.

I have applied the changes on gutenberg.gutenberg.yml file .
please review it , and let me know me any other changes required.

By enabling blockGap on your custom [theme].gutenberg.yml, you also need to define the spacing sizes on the same file. Take a look at the Starter theme: https://git.drupalcode.org/project/gutenberg_starter/-/blob/1.1.x/gutenb...

We try to avoid any style configuration on gutenberg.gutenberg.yml to avoid any conflict with theme's configuration.