Shopify Amazon Quarries

Hi, We would like to sell from our Shopify store to Amazon. Can we set a higher price for products sold on Amazon – is it easy to do?

Yes. Price can be altered in a feed. For this, they need to use the command:
rule discount(1.20, *, p)

You can find more info about increasing or decreasing price here

1. When you sell products from shopify to Amazon , can we set a different price ?

Yes we can increase or decrease price as needed.

2. If we can set a different price , is it applicable on all platforms ? shopify , magento etc

Yes. this feature is applicable on all platforms.

3. Is there any restriction around price setup using different platforms ?

No such restrictions. Usually, regular_price is used in feed and if available, sale_price is also used. And this is used in same manner for all platforms.