I'd love to see this added too, I recently had to temporarily close some of my more work-heavy commission tiers for various reasons, and while I can like "lock" each listing separately, they still appear on my page as normal and you don't even see they're closed until you click to read more on a specific listing. And I didn't want to just delete the listing either-- the best way I could find to like show that a listing was closed was to change the preview image/icon for them, but doing that for individual listings is a hassle.
So if there was a way to close/open certain listings in a way that it's also displayed on your page, it'd be really great.
(Like I'm imagining something kinda like when you re-organize your listings, but instead of moving them around you could just choose what you want to open/close and then press a button to open/close the chosen listings, and if a listing is closed the preview image gets automatically greyed out or something? IDK)