You might have seen this but here's the Manual on Using APM as a SAML IdP SSO portal: https://techdocs.f5.com/kb/en-us/products/big-ip_apm/manuals/product/apm-authentication-sso-13-1-0/30.html

This is about About SSO Credential Mapping: https://techdocs.f5.com/en-us/bigip-15-0-0/big-ip-access-policy-manager-visual-policy-editor/access-policy-item-reference/about-assignment-items/about-sso-credential-mapping.html

This is about Configuring APM as a SAML IdP for Inline SSO: https://techdocs.f5.com/en-us/bigip-16-1-0/big-ip-access-policy-manager-saml-configuration/config-apm-as-saml-idp-inline-sso.html

And, this is about Seamless SSO: Azure with SAML and MFA: https://techdocs.f5.com/en-us/bigip-16-1-0/big-ip-access-policy-manager-per-request-policies/implementing-seamless-sso-azure-saml-mfa.html

I kniw it's not vCenter but here's the info on Integrating APM with VMware Identity Manager: https://techdocs.f5.com/en-us/bigip-17-0-0/big-ip-access-policy-manager-third-party-integration/integrating-apm-with-vmware-identity-manager.html

No idea if any of that helps?

ps