Try the new External Client App Manager to create, manage, and update your external client apps. You can still do all these things with Metadata API, but this new user interface means that now you don’t have to. With External Client App Manager,you can create a local app just for your org or design one to package and distribute.
Where: This change applies to Lightning Experience in Professional, Performance, and Unlimited editions.
Who: The External Client App Manager is shown only to Lightning Experience-enabled users on orgs that have opted in to External Client Apps.
Why: As part of the new generation of Connected Apps, External Client Apps offers the ability to connect external applications with Salesforce data while maintaining security and clearly defining user roles. External client apps are designed with the security of second-generation managed packaging in mind.
https://help.salesforce.com/s/articleView?id=release-notes.rn_security_eca.htm&release=250&type=5