has anyone been able to use letsencrypt with AWS api gatway? I've been struggling for months. I keep getting https crossed out in red when accessing my aws api

has anyone been able to use letsencrypt with AWS api gatway? I've been struggling for months. I keep getting https crossed out in red when accessing my aws api gateway endpoint.... I generated certificates for *.mysite.com and when I go to api.mysite.com it throws warning and if you continue the https in the address bar is red and crossed out....