I’ve installed several plugins and customized a theme with a page builder (Elementor) in the the dev environment. I would like to transfer my plugin settings and the theme customizations to the staging and production environment.
Those things are probably stored in the database. I don’t believe Trellis includes anything for automated database transfer because reconciling WordPress databases automatically is a hairy problem that AFAIK has not been solved. Generally your options are:
Manually copy-and-paste over any changes
Push your entire database, overwriting whatever database exists on the remote server
Manually resolve database differences in the database itself (which sounds like a nightmare)
I use WP DB Migrate Pro, which is a great plugin, but keep in mind that it is overwriting your databases, not combining them.