Following new parameter is added in R12.52SP1CR10a.
Support for IIS 10, InstallAnywhere 2020 SP1, New SameSite ACO Parameter
https://techdocs.broadcom.com/us/en/symantec-security-software/identity-security/siteminder/12-52-01/release-notes/new-features/web-agent-new-features.html
Is new ACO parameter(samesiteincompatibleuseragents) available in unix platform?
CA SiteMinder R12.52 SP1 CR11
This parameter is available for all platform in R12.52SP1CR11.