Stripe has apparently gone with a whitelabel exchange instead, Zero Hash, and has branded this offering as "Link".
Link, a Stripe product, uses Zero Hash, a liquidity partner, to facilitate crypto purchases made through the Link by Stripe widget. Zero Hash is responsible for the fulfillment and delivery of your crypto order placed through Link.
January 2023 now, ...
This page on OpenNode's site still shows "Coming soon".
Stripe's Marketplace shows an entry for OpenNode but that too shows "coming soon":
https://marketplace.stripe.com/apps/opennode
Stripe has apparently gone with a whitelabel exchange instead, Zero Hash, and has branded this offering as "Link".
What is Link's relationship with Zero Hash?
https://support.link.co/questions/what-is-links-relationship-with-zero-hash
Stripe Debuts Fiat-to-Crypto Payment Offering for Web3 Businesses
https://www.coindesk.com/business/2022/12/01/stripe-debuts-fiat-to-crypto-payment-offering-for-web3-businesses
An embeddable and customizable fiat-to-crypto onramp
https://stripe.com/blog/crypto-onramp