[Switch] Can't Connect Nintendo Account to EA Account

Should be able to link it to your EA account however, keep in mind that the Switch version does not contain cross play and progress in game will not sync to other versions of PvZ:BfN

See FAQs for Switch version here:

https://www.ea.com/games/plants-vs-zombies/plants-vs-zombies-battle-for-neighborville/about/switch-features

"Will there be crossplay?

Crossplay will not be available on

Nintendo"

"Can I carry over my

progression from another console to the Nintendo Switch?

Since cross-play is not available, you will not be able to carry over your progression from another"