This major release includes the following additions:
Upgraded to .NET 7.0
Upgraded to OpenIddict 4.0
Dynamic Permissions and Features
External Localization Infrastructure
Distributed Entity Cache Service
Layout Hooks for the Blazor UI
Checkout the original announcement.
If you are considering upgrade to v7 or migration from Identity Server to OpenIddict and have doubts feel free to have a quick chat with one of our experts.