Update: fixed on my side too. The cause was Creative Assets (header / search result videos) that were still processing. In App Store Connect, the header showed a cloud icon instead of the video. Once I removed only the placements whose video was still processing, the app became available on the store about 1.5 hours later. The fully processed assets stayed. If you're stuck on "Ready for Distribution", check the Header and Search Results tabs on each localization of the version. Any asset that never finished processing seems to block the release.

Same here. It started around the same time. New app approved and set to "Ready for Distribution", but not on the App Store at all. All agreements, tax and banking are Active. No pre-orders, no future release dates, and all territories show Available. Two support cases are open (102996037194 and 102997549231), with only automatic replies so far. Phone support isn't available to me either. It looks like something on the distribution side is stuck for several developers. Could someone at Apple take a look? Thank you.