Excerpt Length on homepage

Hi!
I am afraid I do not understand what you mean.
Do you want the full content of all the posts to show on the home page?

https://i.imgur.com/adeuTbE.png – remove excerpt

So you only want the post tile and featured image? No text?

yes

Adding this code to the Additional CSS option in the Customizer
will hide the excerpt on the home page, but not from the search results and archives:

.home .entry-summary {
	display: none;
}

While this code will hide it both from the home page, the search and the archives:

.entry-summary {
	display: none;
}