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":
Coming soon. Request to get notified when this app is available to install.
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.
An embeddable and customizable fiat-to-crypto onramp https://stripe.com/blog/crypto-onramp