Ory is the largest open source community in the world for cloud software application security. We maintain advanced open source security software solving authentication, authorization, access control, application network security, and delegation. Ory implements a variety of industry and best-practice standards including OAuth 2.0 / OAuth 2.1, OpenID Connect, Zero Trust Networking, Google Zanzibar Policy Framework, FIDO2 U2F, WebAuthn, TOTP, and more.

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What is the typical deployment? Should I have two separate Ory Network subscriptions? One for internal sites/dev and another for the prod environment.

That is a valid approach if free does not work for you in dev. You can use the Ory CLI to script some automated config sync.