I do not know any starndard solution for syncing Tryton and Amazon but it may be interesting to implement as web_shop backend.
We have a customer that may be also interested on having this integration but for now he is starting to upload his catalog to Amazon. I’ve they get a big volume of sales from amazon they may consider automating the integration but for now they plan is to enter sales manually on Tryton.
To upload products we are generating a route with a TSV file, which is read from an ecommerce integration platform which sends the products to Amazon.
I’m not sure if this helps you.