2007 1.9 TDI - Stalling on the motorway 😬

Had the engine intermittently lose power then eventually stalled on a 70mph road. Towed to the garage and they found the EGR to be super clogged.

They cleaned it out thoroughly but it happened again! Back to the garage and EGR still clean. Could the deposits of soot seeped into the throttle body mechanism causing it to stall after 30mins on the motorway? (not an ideal place to stall)

Would an EGR delete and remap solve this?

Have looked to sell the van honestly but there’s little interest in a generic van that is mechanically sketchy!