Ecuador: my recollection is they did the deportations without process which is probably illegal and was therefore halted by SCOTUS pending a final decision. The administration sent a plane after a lower court had ordered them not to, then claimed incompetence. As far as I am aware, since then deportees have been given enough process that it hasn't required another trip to the shadow docket. I'd personally bin this under "not descriptive of the legality of ICE's campaign in general" because it (afaik) is halted indefinitely. It's terrible, for sure, but that's not the question at hand.

Detentions: I've read a handful of stories of citizens being detained in the dragnet operations, then released. We'll see if they have successful civil rights suits. Depending on the scale, this could disprove the contention that ICE is largely acting within the law. Since this isn't a haphazard operation, they probably have some reason to believe their detention powers cover this.