Current state

The note in the chapter 13.4.3. Configuring 3scale API Management to work with RH-SSO explains:

To use the same credentials across two different products, you must configure a unique OIDC issuer for each product or the same issuer, but a different realm.(...)

Expected state
The note should explicitly say that "credentials" means "client_id + client_secret", both of them must be the same across two different products. It is not possible to have the same client_id across two different products with different client_secret.