It is dynamic block so if you paste it on your website it will be blank as you need to set up the content first. For that you can use ACF pro Repeater field (or Metabox):
- Create Repeater field via ACF with text element (for tab heading) and text (for tab content)
- Go to Oxygen editor and paste the block
- Query the dynamic data from your ACF repeater field – first to Repeater of Tab heading, then do the same for Repeater of Tab content. There 2 repeaters fyi.
- Check the block settings (codeblock) to see what you can do with that (CSS part)
More info, options and demos on: