spec.lifecycle of a component can be a useful indicator of the maturity of a component. However, it is an arbitrary string in the Backstage spec, and the catalog can get confusing when people enter arbitrary values.
You can enforce a small number of valid values with the following check:
|Backstage component metadata lifecycle should be valid
|Only a small number of lifecycles are supported.
|Entity Metadata (this is built-in).
|Is One Of
Make sure to adapt the Value field according to the lifecycles you want to support.