iDeal payment method is available for restaurant accounts in the Netherlands with Stripe direct integration enabled.
To enable it, make sure that the restaurant has enabled the Online payments service and has connected a merchant account from Stripe. Then go to the Stripe account -> Settings -> Payment methods and turn it on, like this:
Then return to the restaurant admin panel and enable iDeal:
Make sure the currency set up in the admin panel is the official currency of the country where the restaurant is located.
This is how the food client sees iDeal payment method at checkout:
