How to disconnect SIM from network on schedule

I have a 2-SIM phone and need to be able to unregister one of the SIMs from the network each Friday from 16:30 to 20:00. The reason is that this SIM is a duplicate of another SIM which my friends use to stream a series of lectures every Friday. The SIMs have unlimited data, so I want to use my copy for data during the rest of the week. Both of the SIMs cannot be connected to the network at the same time because then the behavior is unpredictable and we do not want any interruptions in the stream. I could physically pull the SIM out every Friday, but I might forget and it's a hassle to open the phone every time. **Is there a way to schedule a disconnection of the SIM from the carrier network on schedule?** (There may be an app for that, but I couldn't find one. I am a software developer, so I can even write my own if there is some way to accomplish this, but I'm not sure whether there is an API that would allow this. I have a Fairphone 3, so I can even root the phone as well.)