Did you work this around somehow?

[lampsbr]

I didn't knew hot to contact you, sorry if opening this was a bad idea. =/

But I'm facing the same issue. The api I'm developing was facing other fastify/graphql problems in earlier version too, so I didn't want to downgrade it, after doing so many code changes to upgrade to nest v8, because of this cors issue.
I just want to listen any external call, graphql and rest, but ATM all I can do is listen to graphql OR to rest endpoints.

Thanks for raising the issue =]