Staging environment for pages only

I am currently developing a news-style website. I am using Softaculous to build changes in a staging environment and then pushing to live when they are ready.

Ideally, however, I would like to stage changes to the site's pages while simultaneously keeping the production site updated with articles (ie, posts and images).

Changes I would like to stage, besides additional/edited pages, would be changes to themes and plugins. Ie, everything except posts an d the media library.

Is there any easy way to achieve this?

From what I can tell Softaculous doesn't so much as merge as simply push from staging to production — so if I were to update any posts on product and then push to live, those posts would get overwritten/removed after the site updates.

Thank you in advance!