This control maps to 3 controls across 3 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.
IA-8(2) Identification and Authentication (non-organizational Users) | Acceptance of External Authenticators. (a) Accept only external authenticators that are NIST-compliant; and (b) Document and maintain a list of accepted external authenticators
IA-8(2) Identification and Authentication (non-organizational Users) | Acceptance of External Authenticators. (a) Accept only external authenticators that are NIST-compliant; and (b) Document and maintain a list of accepted external authenticators