I have scheduled posts for lemmy in the past using lemmy-schedule, so I won’t say no to this feature, but I don’t think it needs to be a high priority. It is most useful for community moderators that do things like schedule weekly posts (what I have used it for) or create threads for specific events (sporting event, community movie night, etc.). This is something that wouldn’t be too hard to live as a third-party tool interacting via an api (if a piefed api exists…I haven’t checked).