We are excited to see the continuous growth on the submissions of the SharePoint Framework solutions to the app source and on the usage of the SharePoint store for extending experiences for SharePoint and Microsoft Viva. It enables the same code to be used easily across the Microsoft 365 with this widely adopted tooling which uses industry standard tech with easy and automatic SSO and hosting. Deprecation of SharePoint add-in and Azure ACS authentication models - UX powered extensibility should be transformed to us SharePoint Framework powered implementations. Add-in model was introduced back in 2012 and has not really evolved since. Additional capabilities and features for SharePoint Framework solutions in Microsoft 365 as part of the SPFx 1.18 release. Please see following resources around getting started on building extensibility for Microsoft Teams, Microsoft Viva and SharePoint using SharePoint Framework.
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Read more at https://bit.ly/3GQ48xA
Source: Microsoft Tech Community SharePoint Blog
