Not forgotten, there’s a whole crew of people who are interested in taking care of them! See https://forum.inaturalist.org/t/amount-of-unknown-records-is-decreasing/8594
Luckily you can bookmark the search urls that already pull up the sets you want:
The whole set of Life and Unknown together:
https://www.inaturalist.org/observations/identify?reviewed=any&per_page=100&iconic_taxa=unknown&order=asc&without_taxon_id=67333%2C131236%2C151817
Just Unknowns:
https://www.inaturalist.org/observations/identify?reviewed=any&per_page=100&iconic_taxa=unknown&order=asc&without_taxon_id=48460