I don't know why I can't use the generative extension; it's not active in the object menu.

To understand how Generative Expand work please review Generate vector graphics to expand artwork in Illustrator

If you will stack again on this problem please describe your steps in details for understanding what are you doing wrong. Thanks

Hello @amparo_0170,

Thanks for reaching out. Could you share more details like the version of the OS/Illustrator installed, and a small screen recording of your workflow and the problem, so we can better assist you?

Looking forward to hearing from you.

Anubhav