A feature is probably a "mini story" - a story can cover a whole range of different things that might be needed, but a feature is likely to be quite specific to something new. But there's plenty of space to make it fit what you need too.
I'd start with a look through https://www.atlassian.com/agile
I have multiple projects that use variations of the same base workflow. The variations depend on the requirements of the project or issue type. The variations mostly come in the form of new statuses ...
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