Yes, I made the same way. Bought switch 2.1.0, and Pokken. Inserted and console says to update. I updated and after rebooting I receive 3.0.0.
Checked browser trick with dns all is working.
I thought the "Zelda v3.0.1" on-cart update was debunked?!? THIS post said the update notification actually came from the Internet. THIS post says that v3.0.1 is required to play Zelda, with the "001" cartridge—not that the update is on the cart.
I thought the "Zelda v3.0.1" on-cart update was debunked?!? THIS post said the update notification actually came from the Internet. THIS post says that v3.0.1 is required to play Zelda, with the "001" cartridge—not that the update is on the cart.