Here ground target was in front of F-35 so the radar could worked simultaneously in two mode.
F-35 is stealthy ( low observation from enemyradars) so it has different engagement procedures and maneuvers. There is no dogfight.
EF radar locks at wide angle , could send A2A missiles from wide angle. More advantages in dogfight. İmagine F16 with stationary AESA versus EF with repositioned AESA antenna? İ would prefer EF .
You don't need radar in WVR engagement. Specially after helmet mounted display. Pilot just have to look and its good enough for targeting.