So I am currently trying webflow and I wondered if it is possible to realize all the front end on web flow and with a paid plan export the code to be able to easily connect a mysql database on it and realise all the back end like a normal development ?
Yes, it’s completely possible, as you’d do with any other HTML/CSS template. The code that Webflow produces is clean and of quality, and many already use Webflow to make Wordpress templates or to make Drupal front ends. i’ve been designing several sites that have been connected to various backends using various tech (PHP/SQL, JS/Mongo etc).