Originally Posted by
thijsseh
No, unfortunately not. Lounge access is linked to your departing flight, not your incoming one.
Might be possible if on the onward fare class is still a business one even if the seating is all economy (assuming OP is no status).
Buy-in is also possible.
For 6h 30min, might be better to get a DIH room or something for 4hr then take the bus across to T2.