Use terminal maps to plan your drop-off or pick-up point; some ride-hailing apps designate specific zones

https://cristiankgzr737.iamarrows.com/driving-to-heathrow-airport-best-routes-traffic-tips-and-drop-off-rules-1

Use terminal maps to plan your drop-off or pick-up point; some ride-hailing apps designate specific zones, and short-stay car parks are signed clearly.