Create content pack from subflow
From studio there's an option button called CREATE CONTENT PACK, which is at root all flows and does end with a jar file containg all flow. But that is not possible to perform to a single subflow, the button is greyed out and such capability is off.
Is any way to do this?
I think you are mixing up terms. The Create Content Pack button works at the Studio *Project* level. Under each project, you will basically see the same structure of "Library" and "Configuration", and "Properties".
The Create Content Button greys out as designed when you've selected something inside a project.
So if you want to create a CP on a subflow, then sounds like you might have hit a break point in your flow development. This could mean you have a single project with too much stuff in it. There is a bit of mental slicing and dicing you need to get through to appropriately separate your content into deployable content packs which can depend on each other*without* causing cross dependencies issue - which are a total headache at times.
If this is somewhat identifying your issues, you might want to read this ... the top portion:
I'm not sure if there are more worthy write ups on what you're asking about ... assuming I understand your ask/issue correctly.