How can I install unstable version helm chart app with "Apps & Marketplace"

Hi, all:
I use gitlab package registry serving my helm chart registry, and store charts has some versions like:
v0.1.0, v0.2.0, v0.3.0 and v0.4.0-alpha.1
I also add this chart registry to rancher
But when i want install chart with “Apps & Marketplace”, i only saw v0.1.0, v0.2.0, v0.3.0, i dont’t seem v0.4.0-alpha.1, just like hidden.
How can I install unstable version helm chart app with “Apps & Marketplace”