State of flutter web, and server-side solutions?

Hi, I am not really a web developer, but want to compile my mobile app project for web as a quick solution.
It’s basically an ecommerce app.
So,

  1. what’s the current state of flutter web to produce high quality web applications? Some youtubers are talking about it, others showing some laggy performance on mobile screens against native solutions.
  2. Do I need to use Nodejs with it if I use Firestore as a backend solution?

Thanks for your time, I am fairly new to the forums too!