Be aware:

• there's Rizful custodial NWC wallet: https://rizful.com/
• and there's Rizful node in the cloud: https://rizful.com/node_in_the_cloud

Are not the same thing. I suggest to use the node option as a LN backend for a BTCpay. Even 1 max 2 private channels with a good LSP will be enough for a webshop.