Based on the above, I understand that products brought from the Unreal Marketplace should display the date, including the year, of the initial publication?
Unfortunately, on all my migrated products, the date is still September 25th of last year, that is, the date of the transfer to FAB, and not the date of the original publication.
Same here. My assets still display migration date instead of publication date.
Thanks for raising this - I’ll check with the team to see what’s going on.
Ok, so it looks like the fix we released did not work as intended (as you both rightly pointed out). We’re looking to address this in the coming weeks and will update you when it’s properly fixed. Apologies for the mixup and thanks for your patience. 
I’ll update the release notes and known issues threads to reflect the actual state of affairs.