ICE was always deployed at a limited set of airports (for the TSA defunding nonsense) - around a dozen. They have pulled out of some, but remain at others; they were still at ATL last week.
DFW generally has short lines, but their online time estimator really sucks ass, including often listing checkpoints as open when they’re closed.
There’s nothing to test. Millions of travelers enter and exit legally every day without issues.
Actual US border control has always been pretty serious as long as I remember. Not like Italy where they don’t even look at my passport and go straight to the stamp page and move to along. It’s not changed in any meaningful way that you’d noticed.
I entered during Good Friday (I didn’t realize when I booked the flight) and the line wasn’t that bad considering. I only realized it was Good Friday because there was a longer line than I was expecting.
TSA through DFW shall I say was even pretty good? Line was short and they were more cheerful than usual which I thought was strange. Seeing cheering TSA agents
Most people, including foreigners, are not having issues. But if there’s an issue, it’s going to be an extra bad day these days (even compared to previous bad days when customs and boarder control comes into play) and issues may arise for relatively minor and arbitrary reasons compared to before.
The queues in Milan right now are really quite bad. Officially they now stop the fingerprint collection if more than 1 hour of wait time. On Friday morning it was 30minutes for European residents or 150m while the ex EU queue was about 500m going back 2 buildings and moving very slowly.
In the baggage pick up area at my band there was still a bug section of bags from a Beijing flight that had arrived 3 hours prior (or 2 hours before my flight). So that was the actual waiting time - around 3 hours on arrival for non EU passports… I’m not sure they had already stopped the fingerprints for foreigners. For EU it was still self service fingerprints and camera…