I’m in the same boat with an international flight this July. Our reservation looks fine, but flights are gone from the DL booking engine. Just give it some more time and the reservation will eventually update. Changes are typically loaded every Saturday and into Sunday. Check back after this weekend and see. If not, just check weekly until it updates. They roll them out in stages so as to not overwhelm call centers. I know it’s tempting to want to get it resolved immediately, and I’m bad about doing that in “normal” times, but now especially it’s better to just wait and see how things progress. Then deal with them as they come about.