I think this is a little hyperbolic. The product may drop features, increase prices, and squeeze its free tier users. Everything enshittifies. But the idea that password export might disappear or be degraded? Nah. You'll be able to jump ship any time you want.
Google Authenticator has an export-as-QR-code function that several other authenticator apps can parse. Is it the best/most convenient implementation? Obviously not, but you can absolutely export the codes.