Which solution to choose for microservice API security?

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Dear toasters, please share your experience.
The story is such that in an on-premises company, we also need to launch a fairly large number of microservices on a RESTful API. There is a tight security issue, and from everything that is on the market, we settled on pleasant and convenient JWT + OIDC protocols. We choose a solution for this and we can’t find anything other than clouds and third-party services.
Do you have an on-premises installation solution in mind? Registration of services and authentication are required, taking into account the specified technologies. If there is something similar, then do not keep it in yourself, I will read it with pleasure - it will be interesting.