Recommendation for Company Kubernetes Issuer

[kyubisation]

Hello there 👋

At my company we are interested in adopting Sigstore.
We want to sign our containers with cosign, ideally with the Kubernetes Service Account token used in our Tekton Pipelines.
With our clusters (~50), we have our own issuers.
We verified with a local docker compose setup that it works, if we add our issuers to meta-issuers in config/identity/config.yaml.

My question is: Is the recommendation to run our own Fulcio instance or is there a path to being added to the public instance of Fulcio?

(I have read new-idp-requirements.md, but I was not sure whether that applies to this case.)