That I can’t tell you. My Graphene phone broke and I’m using a Googled phone at present (bleh).

I checked Graphene’s features page, but this was all I could find:

Call recording functionality within the Dialer app using modern Android storage with recordings stored in Recordings/Call Recordings and no restrictions based on region or special cases like playing a recording tone (users are still responsible for complying with their local laws).

GrapheneOS has native call recording without root. I haven’t used it in six or eight months, but it worked last time I tried it.