I know this is a bit late, but if anyone else finds this, here’s how I got the dashboards in the global tenant space:
setup.ilm.enabled: false
setup.kibana:
host: https://kibana.dragns.net:443
username: ${USERNAME}
password: ${PASSWORD}
headers:
securitytenant: global
On a side note, my kibana is public and mainly using OIDC for auth. I added a user for metric beat to get by.