I’d see if other 2017 Escapes do it. If not, it’s a warranty fix.
One more suggestion. Have your UNCLE go back to the SALESPERSON that handled his sale and have them do a ride along. Then if there is something amiss they could intervene with the service department.
But, of course, there are good sales people that want to keep you as a customer and ones that don’t care. Hopefully his is the former, not the latter.
I have never been bothered by turn signal clicking. Turning up the stereo volume is fairly effective for tire noise on rough road surfaces.
I wonder if it’s just the first click of the flasher being activated?