It seems to only affect new apps. I added an app around 12 hours ago and it is not showing up in my apps list. My other apps that are live are all visible. I can't add this app again because I get a message that the bundle ID is already used (by the app I added earlier which is not showing up) So it's quite problematic.

Not resolved for me.

A lot of people are affected by this. I tried to solve it for some time but I decided to just wait for Apple to fix it.

I created an app a few hours ago and I am experiencing the same issues. The new app is missing in app store connect... Reached out to Developer support. Hopefully they find a solution soon!