Great to see you are an early adopter of the new Jira Work Management experience! The product is still very new and there's definitely tons of additional things to come.
As of now, done items can be shown in list view using the filter in the top right corner "Done items". They are not shown in the list with active items anymore, that is true. I think that's a design choice to strengthen the focus on just things to do.
As a workaround for reporting purposes, you can always use the issue navigator to search for all issues in your project (Filters > Advanced issue search).
Hope this helps clarify a bit where the product is now. Your suggestions seem very valid feedback for the team behind the product. So don't hesitate to hit the give feedback button in your project to post these ideas directly to the team.
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