in Magento2 (CE or EE version) there's a way to set custom quantity and custom price for products based on Store or Store view? Or it's required to set that informations at Website level?
You can set quantities per stock and assign stock to a website with Magento MSI (>=2.3.0). The same for the pricing. A price can be set by the website only. To enable website specific prices, in admin panel
Stores → Settings → Configuration → Catalog → Catalog → Price → Catalog Price Scope → Website. Store view quantities and price features are available through custom extensions only. See Store View MSI Sales Channel and Store View Price Scope from ecombricks.