My current company website was built using Advanced Custom Fields Pro due to a custom theme, and I would like to make content additions to a page by adding more rows reusing parts from my website pages, such as bullet point templates (created through repeaters), etc. Can I do this using ACF, or do I need the developer who configured the site?
Sounds like you just need a developer, yes you can do it, but would need a lot more information, code, etc to be and to do so.