I don't think that functionality exists for Backdrop's Feeds. Best way to find out is to post a question in the Feeds Github issue queue, so that the maintainers can respond.
Probably not the reason, but worth to do a quick check:
Sometimes the update cache interferes, so if something's odd with updates - some module (or core) claims to have updated, but then...
The issue with checking for updates in the BackdropCMS dashboard makes website development and maintenance more difficult. I manage more than ten websites hosted by two different providers, one...
Comments
I've never imported comments with Feeds in D7. How do you do that?
Never done it in Drupal7 either, but from D7 to D9
I don't think that functionality exists for Backdrop's Feeds. Best way to find out is to post a question in the Feeds Github issue queue, so that the maintainers can respond.
https://github.com/backdrop-contrib/feeds/issues
An upgrade from D7 to Backdrop will include the comments by default, unless you have opted to do a migration manually instead.
If so, have you tried Migrate?