Description

DPoP should be suported for all grant types on the AccessToken endpoint as defined in the specification.

RFC9449 section 5

...
This is applicable for all access token requests regardless of grant type
(e.g., the common authorization_code and refresh_token grant types and
extension grants such as the JWT authorization grant
[RFC7523])
...

At the moment 05.06.2024 DPoP is only supported for grant_type=authorization_code