Looks like plain radars to me, not phased array, especially since there are two of them with a small angle between, which would be useless with a phase array radar.
This is a plain classical automotive radar:
Continental Automotive
I don't know how the car pictures above give any clue there is a phase array radar.
On the other end, it would be strange if Tesla was testing only plain radars, since automotive phase array radars do exist now
Edit : ah, found this
Tesla spotted testing prototype with new array of sensors - Electrek
Without a peak under the covers or a part number, it’s nothing more than a guess.
Those packages say phased array to me because of the flat, square shape. That’s exactly the geometry of a typical phased array, to get the phase timing between elements correct for beam steering.
Other types of radar need different antenna shapes - but a different shape could be hiding under that cover, possibly, if the antenna is a lot smaller.
As for the two with relatively near angles, remember that Tesla is after autonomy these days - which means safe operation with a failed sensor.
There are a number of ways they could accomplish that, but sensor redundancy is one of the easiest, and since beam power falls off as you steer it, they might well choose to point them a little apart to optimize performance when both are operational.
