Add default Authentication Flow

Is it possible to add a new default Authentication Flow to all new realms?

I have a custom Authentication Flow that will be used by all “tenant” realms in our service, and I’d prefer not to have to create it every time using the admin UI. I had tried a hack-y solution of having a templated realm dump that I just changed the realm name in, but I’m always encountering problems when a new Keycloak version is released.