As of January 14th 2021, the IMA iOS SDK allows limited ads to be served when the user does not give consent to cookies, the user denies consent to cookies, or when IMA does not receive a valid TC string in GDPR and ePrivacy regions following the grace period of IAB TCFv2 integration.
For client-side SDKs you must use theltd parameter to
trigger a limited ads request.
Please see this
Limited ads guide for
more information.
It is also possible to enable limited ads automatically through integrating with a Consent Management Platform (CMP). This is supported on version 3.11.1 of the iOS SDK and all later versions.