Can't stage a draft page for publishing

Newbie issue here (I think) - I’ve got a coming soon page that is currently published to the domain. I’ve been working on a homepage for launch as a draft.

I’m ready to move the homepage from draft to stage for publish, and then make that my default homepage, and publish to staging site for internal review with client etc.

But it doesn’t seem to be allowing me to “stage for publish” I’m not even sure where this should be appearing, but the button where I would save as a draft and duplicate etc are grayed out:

Probably something simple I’m missing - any help appreciated!

Here is my site Read-Only:
Webflow - Vault)

Is it possible you’re on a free site plan + free workspace plan, and have exceeded the 2 static page limit?

It looks intentionally disabled so that’s my best guess.

If not, you may need to contact support.