I remember that CrashPlan capability, but I forget how it handled deleted files, e.g.
Restore deleted file (recently active on forum, and I think all of this has old topics)
notes the difficulty of getting started on restore if you can’t find versions to start at.
Deleted file retention used to be one of CrashPlan’s selling points. It got worse but
maybe it left some good ideas behind in terms of UI features handy for that design.
I haven’t thought about this in awhile, but thought I’d chip in another common “ask”.
Maybe that’s a separate request. It sounds like you already have a first cut at a UI.