Photos module
The Photos module allows you to create content manually, or bring in an existing RSS-based photo feeds, such as Instagram.
Manual adding
To manually add news content, go to Add Content -> Photos -> Manual. This will automatically create a new collection which you can additionally modify to your needs.
To add an item to that collection, click on "+add item" and fill in the content.
That way you can add as many collections and items as you want.
RSS adding
To add an RSS feed, go to Add Content -> Photos -> RSS/Instagram and paste the RSS feed link.To add an Instagram feed, you can follow this tutorial: https://support.shoutem.com/article/302-instagram-integration
Once your galleries are configured, placing them into your app will result in a similar interface to the one below: