Base SAS Models can be imported into Model Manager.
Check out the documentation page here to details on file type restrictions and how to import.
https://go.documentation.sas.com/?cdcId=mdlmgrcdc&cdcVersion=15.3&docsetId=mdlmgrug&docsetTarget=n00ohu3nsm5acqn1gjon0sohl26p.htm&locale=en
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