It looks like changes to physical measurements don't show up in the "diff" module ( https://www.drupal.org/project/diff → ), that allows comparisons between revisions to see what changes have been made. The field shows up as not changing between revisions.
To accomplish this, it looks like a src/Plugin/diff/Field/PhysicalFieldBuilder.php would need to be implemented, extending diff's "FieldDiffBuilderBase"
I need this for my own project, and might come back and implement this if it's not an already obvious duplicate.
Needs work
1.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
@TrevorBradley thanks, this makes sense. Could you please turn this into a MR? Furthermore, you implement some methods that can just be inherited, the parent:: calls are not needed, as they don't do anything more useful here.