I have an Exotic weapon shotgun - lord of wolves, I got it when the tangled shores existed in our dimension, now the merchant Xur brought it, I look at my shotgun and it is no different from what the merchant Xur brought, but here’s the strange thing , many exotics have simply become unavailable at this time, although they were previously available and I have them! I wanted to finish the polar spear, what was my surprise that now this is impossible! I still have a stub of a quest weapon that I never completed to the polar spear
-
It's available at the "exotic kiosk".