I’m managing SEO for a website that currently runs on WordPress, and the website is ranking well for several important keywords.

We’re considering moving the website from WordPress to React.js mainly to improve the website’s mobile experience, performance, and overall development flexibility.

My concern is whether migrating from WordPress to React.js can negatively affect existing rankings.

For those who have handled similar migrations:

Does moving from WordPress to React.js usually affect organic rankings, even if the URLs remain the same?

What SEO factors should we be especially careful about during the migration, rendering, meta tags, canonicals, structured data, internal links, redirects, sitemap, page speed, etc.?

Would you recommend making this migration if the current WordPress website is already ranking well, or would you first try to improve the existing WordPress site?

Would really appreciate insights from people who have handled large website migrations or have 10+ years of SEO experience.