Hi there, @Sos_casa_Roma_srls and welcome to the Community 
Thank you so much for the feedback!
I am glad to say that you can disable the Schema markup on the Settings tab of your widget’s settings, if needed 
As for changing the markup type, the Product markup was intentionally used in the widget because it’s the only one that can appear in the Google snippet in search results. Other types of markup won’t work there.
However, if you’d still prefer changing the markup type, you can upvote this Wishlist request - Enable businesses to set the Product markup types