Even a single person can now build/maintain native apps. It's literally a day of effort for an experienced dev working with the best current models to port an app to a new native platform. Maybe another day or two to walk through wiring up all the test harnesses needed to prove the app is working well without a human having to click everything. Until recently you'd still have to spend a bunch of time on making sure the UI looked and felt right, but models now have good enough vision capabilities to where even that can mostly be automated.

And, honestly, the cost of tracking React over time has always been higher than the cost of tracking native deployment options, which move more slowly and usually with more care than React, where breaking backward compatibility is just another Tuesday. I don't think the promise of React Native being an almost-free "native" app actually pans out in reality. I've never maintained a large React Native app, but from following some apps that are, it seems like it introduces a sizable amount of technical debt that you pay over time. So, in exchange for worse software you also get worse maintenance costs.