Length Excerpt

you need to use post summary

Thanks for the reply, so when I create my cpt I have to do two actions: compile the content and compile the summary with a few words. Isn’t there an automatic way to display a fixed number of words?

So presuming you are using the ‘text editor’, you would pick the ‘dynamic tags’ option, and select ‘Post Summary’. Click in the Post Summary field, and then a box will appear where you can select the number of ‘words’.

https://prntscr.com/szqb08
https://prnt.sc/szqb8i
https://prnt.sc/szqbys

thanks, I solved it.
I used post content and not the text editor.