By "he" I presume you're referring to the Biden administration. What "pipelines" have they closed? Biden pulled the permit for the Keystone XL, but that's not so much closing a pipeline as prohibiting a new one from being build (maybe you were including that under the umbrella of "closing"?). The other Keystone pipelines are still operating.

There is also news about possibility closing the Line 5 pipeline, but that hasn't happened and he recently indicated that he had no intention of closing it.

Is there another (or multiple other) pipelines that have been shutdown by the administration? A google search only comes up with the Keystone XL and Line 5 pipelines.