@Srivalli
Azure AD B2C currently supports passing only the access token of External IDPs. ID token issued by B2C can't be added as claim in the token.
Below are the docs for passing the access token of External IDPs as claims using custom policy and built-in user flow:
- https://zcusa.951200.xyz/en-us/azure/active-directory-b2c/idp-pass-through-custom
- https://zcusa.951200.xyz/en-us/azure/active-directory-b2c/idp-pass-through-user-flow
-----------------------------------------------------------------------------------------------------------
Please "mark as answer" or "vote as helpful" wherever the information provided helps you to help others in the community.