It doesn't. There's a long youtube video, linked elsewhere on here I think, which compares the whole of VW's SUV range, including the T-Cross. Specifically states there's no sunroof option. I think it's due to lack of headroom. Same is true for the Seat Arona, which the T-Cross is built alongside.
All Volkswagen T-Cross related discussions
Looks like spare wheel option has been added to the Configurator. Quite reasonable price I reckon - £115. Hopefully dealer will let me add it to my order!
T-Cross SEL manual 115PS ordered 7/3/19. Extras: Deep Black Pearl, folding door mirrors, winter pack and rear view camera. Car was built 15/4/19 - delivery due mid May.