Probably because it's not happening there to nearly the extent it happens at big tech companies, partly due to the culture of older companies and partly due to the company attracting a certain type of morally agnostic person. Exxon did not release a statement following Friday's supreme court decision like most tech companies did and did not respond to comment when asked about it.
Just going to toss my hat in the ring and say that I think selling data to ICE falls on the right half of the right/wrong spectrum. Not everyone agrees with your specific take on right and wrong. Sometimes those discussions shouldn't happen in the workplace.
Belief that statehood is evil or that free immigration is a natural right are fairly out of the mainstream. Given that tools that support enforcing the opposite is mainstream.
Migration impacts all kinds of things which are intertwined with physical scarcities and order- community service funding, housing needs and so forth. Having an orderly process for migration isn't at all related to cryptocurrency; many aren't actually private at all, and for the most part merely allow control over the supply to not be controlled by a central agency like the federal reserve.
Being opposed to unlawful migration would be the equivalent of opposing people generating coins off the chain then forcing them in, creating more than were actually generated by mining. (I may have butchered the analogy, hopefully it at least makes some sense as to why they may not see it as an ironic or hypocritical stance).
ICE is just a continuation of slavery. If Central/South Americans didnt continue to be leveraged by EVERYONE in the economy then there would be no american dream for them quest over the boarder for.