GermanThemes

Some Gutenberg Blocks or WordPress Themes add unwanted space around blocks. This small plugin allows you to remove the top and / or bottom spacing for any Gutenberg block. This is especially helpful to remove top or bottom spacing of Heading and Group blocks.
The settings are added to the Advanced tab in the Block Sidebar. See screenshot below.

GT Remove Block Spacing

Remove top and bottom spacing for any Gutenberg block.

MOTOKI

Motoki Spacing Controller allows you to: 
* Adjust top/bottom padding and margin per block 
* Apply styles separately for PC and smartphone 
* Set spacing values via intuitive block sidebar controls 
* No need for custom CSS – just click and go
Useful for: 
– Designers who want precise control over vertical spacing 
– Responsive web development 
– Consistent layout across devices
This plugin adds spacing-related class names like <code>pc-pt-10</code>, <code>sp-mb-20</code>, etc., which are applied instantly to your blocks.

Motoki Spacing Controller

Easily control top and bottom padding and margin for each block in the block editor, separately for PC and SP views.

GT Remove Block Spacing vs Motoki Spacing Controller