Let's be honest: we all know EA actually doesn't care how much Mario Kart sells. What they are looking for are Super Kirby Clash and Pokemon Quest. Two titles that Nintendo stopped talking about, some time after they released. Actually Nintendo talked about Pokemon Quest: about their revenue on iOS and Android. Not Switch.
Both games use monetization schemes EA actually cares for. And that they aren't that successful is the actual reason EA doesn't care about Switch. Let's face it: EA isn't a gaming publisher anymore, but a gambling enterprise. And that doesn't seem to work as well on Switch.