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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I see Hydra 2.0 supports <https://datatracker.ietf.org/doc/html/rfc8693|OAuth 2.0 Token Exchange (RFC8693)> - but I don't see docs on it anywhere?

or is this implying that when I saw it was supported it was incorrect? <https://github.com/ory/hydra/issues/1218#issuecomment-1335111281>

I can't say for certain but looks like they meant to say <https://datatracker.ietf.org/doc/html/rfc7523|RFC7523>

See this <@U040QEV826P> <@U03CFV2F8KH>

<https://github.com/Exact-Realty/ts-hydra-rfc8693>
The changelog had an error earlier stating that Hydra supports 8693, but with this package you can make use of it.