Scraping http metrics while configuring keycloak for https

Hello, I’m still new at keycloak’s configuration and I’d like to use Thomas Darimont metrics extension (keycloak-project-example/keycloak/extensions/src/main/java/com/github/thomasdarimont/keycloak/custom/metrics at main · thomasdarimont/keycloak-project-example · GitHub), to scrape metrics on a http port while configuring keycloak to use exclusively https (8443).
I don’t think it is possible but I don’t know all the ways to configure keycloak.
To scrape metrics we are using Google cloud Managed Service for Prometheus, therefore we have to use http.
Has anyone tried to do that ?