You are asking this question because you don't know working of react snap

react-snap is a prerendering tool — at build time, it runs your app in a headless browser, waits for the page to render, and then saves the final HTML (including your meta tags) into the build/ folder. This prerendered HTML is what gets served to crawlers that don’t execute JavaScript (like Bing, Yahoo, social bots, etc.).

That’s why you may not see the meta tags in Ctrl+U when looking at the development or preview build. But if you deploy the snap-processed build, the meta tags are baked into the HTML, and crawlers will get them without needing JavaScript.

So yes — react-snap gives you SEO-friendly static HTML with meta tags, even if they don’t show up in your page source during normal preview.