Description of the need Pseudo fields clutter up the "Manage Fields" page. See https://github.com/backdrop-contrib/xmlsitemap/issues/56

Proposed solution Can we move these fields all to a vertical tab, or at least group them separately somehow, to differentiate them from the regular fields while still allowing re-sorting?
GitHub Issue #:
4002
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