Even in the event that the article is talking about, he at least had some logic behind it

When Walz was elected a few months later, he did try to halt the pipeline’s development. Early in his first term, Walz continued a legal challenge from his predecessor’s administration against Line 3, which he continued until 2020.

But after that legal challenge was rejected, Walz declined to use his executive powers to stop the pipeline, and his administration approved key construction permits that allowed the pipeline to move forward. He told MinnPost in 2019 that he believed a unilateral decision “would violate principles of ‘checks and balances’ between the executive, judicial and legislative branches of government.”

“If you fall on the side that says, ‘Well, the governor should just stop this; it’s the right thing to do,’ then you would be making the case that the next governor should just build one, without any environmental review, without any process involved,” Walz said at the time

Which I don’t 100% agree with but at least see where he’s coming from.