Given that the safety car had pulled in, they were past the safety car line when the overtake occurred, and the stewards were all waving green flags (see below quote from F1 website) , I'd say it was a fair overtake.
Green flag
All clear. The driver has passed the potential danger point and prohibitions imposed by yellow flags have been lifted.
Given that the safety car had pulled in, they were past the safety car line when the overtake occurred, and the stewards were all waving green flags (see below quote from F1 website) , I'd say it was a fair overtake.