Hmm, I confirmed cloudflare module with “caddy list-modules” and see:

<list of standard modules>
  Standard modules: 127

dns.providers.cloudflare

  Non-standard modules: 1

  Unknown modules: 0

But when I do a reload I get “Error: adapting config using caddyfile: Caddyfile:12: unrecognized global option: acme_dms”