I ordered a Tiguan in October 2021 and was delivered in February 2023 so about 15 months all told. Both MB and general folk have had these delivery times some who ordered before me are still waiting delivery.
I don’t know if things are improving but if your lucky you might get a faster delivery because the Mk3 is due to go on sale around the Autumn time so folk will be reluctant to order a Mk2.5 with the 3 on the horizon.