I have tried to get the Branch policies using curl / Postman however I keep getting Error "404 Not Found".

Based on the documentation (https://docs.github.com/en/rest/reference/repos#get-branch-protection), I seem to be using the correct API Uri. see below commands used. Ps: Auth Token has been verified.
For Curl :
curl \
-H "Accept: application/vnd.github.v3+json" \
https://api.github.com/repos/{owner}/{repo}/branches/{branch}/protection
Postman:
https://api.github.com/repos/{owner}/{repo}/branches/{branch}/protection
I need API call to return the Branch protection. Thanks!