Thank you for your interest with BSS extension.
​Regarding your query about Multiple Store View Pricing, we have checked and wanted to give you the information.
1. With this extension, you can set up price for the products based on the currency of your store view
2. For updating the price via Rest API, we're afraid that the extension doesn't support this function.
If you want to implement this function, we would love to offer you customization service, in which we will customize the extension based on your requirements and the service fee will be charged.
If you are interested in our offer, please let us know.