Can i create self-signed certificate with acme?

We can create some normal certificate with acme:

acme.sh --issue --dns dns_cf -d mydomain.com --force   --server letsencrypt
ls mydomain.dom
backup	ca.cer	fullchain.cer  mydomain.com.cer  mydomain.com.conf	mydomain

Can i create self-signed certificate with acme?

Self-signed means that a certificate is signed using its own private key. A public ACME server would never be able to operate this way.

Why do you ask?

Yes, but why would you want that?

You'd have to run your own acme server, obviously.