I have had a read of what Lando provides, and it's an excellent development tool, and it would solve the problem.
But, I would prefer to find out why the problem is there in the first...
You might need to add a Relationship in the View to Flags. Or there might be a setting on the content type. I can't recall for certain but I think it's possible.
Comments
If you check here:
https://backdropcms.org/project/usage
you will see 385 available officially projects, excluding core that means 384 modules.
But if you add modules that are moved to core - https://backdropcms.org/user-guide/features-added-core - 62 items - it results that 384 + 62 = 444 Drupal7 modules have been ported to Backdrop CMS.
At least for my understanding.
I don't know whether some of available modules are not ported but new, created first for Backdrop.
Thanks :)
There are over 725 modules listed on BackdropCMS.org right now.
https://backdropcms.org/modules