We have no evidence of this.
On the other hand, we have the statements that I literally quoted in my comment, where GitHub's COO says "it's important that ICE get its job done because they do X, Y, and Z, which are good," you have sales staff using American flag emoji, etc. Would you expect GitHub's CFO to also "it's important that this ICE-alert group get their job done because ICE does X, Y, and Z which are bad actually"?
To short-circuit it, let's establish as ground-truth that some people think "neutral" is the same has having no position, and some people think "neutral" is a position one can try to take that will have consequences, same as any other position, and at the end of the day, the effects are the same whether it's not a position or a position so the question of "position-ness" of neutrality is moot in a discussion of outcomes.
If a company declares selling computers to the legitimate government of a country is "Just doing business," then, well, that's IBM during the reign of the Nazi party, and history has held them accountable regardless.
These are sliding scales of "how much do I care about the metadata on my customers," and most companies find it optimal to set the scales nearly to zero to maximize revenue. That's not a universal truism.
Seems more like a historical footnote than any real accountability. IBM is still around and the era where "Nobody ever got fired for buying IBM" and had a immense workforce occurred well after the WWII era.