Modern team sites crawled but not searchable in SharePoint Online

Update:

So after a lot of back and forth we narrowed it down to the following:

For users not having been assigned site collection permissions with the "Edit" permission level (either direclty to the site or via the 'Members of' group plus the Office 365 group 'Members'), Teams attached modern teamsites cannot be found through global search or have its contents (like list items and files) be retrieved through document library search.

It doesn't matter whether you're a global admin or site collection admin. If you do not have the permission level of "Edit" it won't work. "Full Access" doesn't cut it here.

Now not to confuse everyone, Microsoft tells me not all tenants are affected but some on certain servers are. The product team is now aware of it and working on a fix but no eta.

Thanks.