for Rancher, I think there’s a checkbox in the UI to show devel releases

I don't see it in the UI or as an option in the rancher2_catalog_v2 terraform module.

it might be a user preference, in your settings?

are you sure to have all the repositories?

I'm adding my own repository hosting local charts. I've added a cattle.catalog.io/devel annotation to the ClusteRepo. I can browse the catalog index file and it shows all charts, but when I got to install a chart, it only shows charts without a "-" in the name. From my understanding, - is used to represent a devel chart, which don't show up.