APIs for creating Custom SAML 2.0 application in Identity Center

Hi,

I've searched AWS and boto3 docs but I can't seem to find APIs for creating Custom SAML 2.0 applications. I'm referring to the ones you can configure in the console under Identity Center -> Applications -> Add application -> Add custom SAML 2.0 application and then you get the Identity Center metadata and you can input the ACS URL and SAML audience URL values.

When applications are deployed, there is a need to programmatically also configure their SAML 2.0 integrations with Identity Center as their IdP. These apps are spun up and torn down relatively frequently so that's why these SAML integrations would need to be done automatically. Other integrations and API calls are done from Lambda functions, so these APIs I'm searching for would be initiated from Lambdas as well.

Can anyone point me in the right direction please? Or if such APIs don't exist at the moment, how did anyone else do this in the past?

Thanks