The green padlocks are only for EV certs. Let's Encrypt doesn't do EV certs (nobody automatically issues those). There's a reason why browsers visually distingu

The green padlocks are only for EV certs. Let's Encrypt doesn't do EV certs (nobody automatically issues those). There's a reason why browsers visually distinguish between EV certs and DV certs, and it's because DV certs don't indicate anything at all beyond the fact that the cert owner is able to serve HTTPS at a given domain.