This came up in https://github.com/backdrop/backdrop-issues/issues/570#issuecomment-1848... and is related to #678.
We need a way for modules to communicate to the user what they are used for in their website before they are completely uninstalled. A good place would be the uninstallation confirmation page/dialog.
GitHub Issue #:
1624
Recent comments
You can use this module: https://backdropcms.org/project/search_api_block
Search Api form in header?
Have you looked at the BG Image Formatter https://github.com/backdrop-contrib/bg_image_formatter
How to access node fields in block template files
You could also try Current Content Display Block which with a bit of config and CSS could get you what you need.
How to access node fields in block template files