How to enable the Gutenberg "dimensions" function in GP?

Hi there,

Looks like dimensions settings can only be enabled in an FSE theme currently:
https://www.wp-tweaks.com/fix-dimensions-settings-missing-in-gutenberg/

We are paying very close attention to FSE compatibility but don't believe it's time yet - GP offers more with the Elements module.

My recommendation would be to use GenerateBlocks and the buttons block which offers much more options than the core buttons block:
https://docs.generateblocks.com/article/buttons-overview/

Hope this helps.