Hi @yuvalNakav,
Ahh yes indeed! So because your app has not been published in our marketplace, whomever is looking to install your app will first need the installation URL from the “Share” page under the “Manage” section of your app:
After the admin on the relevant account has installed the app this way, you can then share the OAuth URL link with them and they will be able to install your app with OAuth as normal.
Apologies for the misunderstanding before!