How to use 'customFilter' in Record Feed Elements Rest callout?

I am trying to query feed-elements via Rest API from the workbench. API ref

/services/data/v51.0/chatter/feeds/record/5001x00000CA8IGAA1/feed-elements?customFilter=CustomFeed

I am getting this error.

[ {"errorCode" : "INVALID_FIELD","message" : "Invalid custom filter name. "} ]

This CustomFeedFilter is already available in ORG.

<types><members>CustomFeed</members><name>CustomFeedFilter</name></types>