I will assume that you meant Free Software Movement instead of the Open Source one, as people easily confuse these two.
I agree how conflicting FSM with RTR would be detrimental to the actual possibility of implementation. However, Free Software Movement actually goes hand in hand with Right to Repair - both are about the basic right to own and control your own device.
Luis Rossmann even (maybe non-intentionally) touched on it in a recent video and said that's it's unacceptable for manufacturers to block bootloaders on their devices, restricting you from the type of OS you can run. That's strictly a Free Software Movement issue and not necessarily a Right to Repair issue.
Right to Repair is basically hardware equivalent to FSM. You can even think about it as such - one is fighting for your right to repair your own device and the other for your right to repair software on that device. Obviously, that's a major simplification and there are many other implications in both movements, but they're both set on the same set of principles.
That's why a big part of the Free Software community is using old thinkpads - they have the freedom to run whatever software they want (as they don't have Intel Management Engine) AND the right to repair and modify the actual hardware (those devices are a joy to open and repair).
I also believe that companies should provide hardware schematics with their devices and customers should be able to repair them and modify them using these. As for the "copy" part, I don't quite get what you mean. What exactly did you mean by copy?
Is a device with one part changed/repaired is a copy? Is a device build completely out of parts got from other, damaged devices is a copy?
Because if you meant that you can't just use the schematics to build and sell a device based on them as your own, original device then that's obvious. Copying a device and selling it as your own creation is just fraud and absolutely not the kind of thing that FSM is fighting for. It's a common strawman argument used by the FSM opposers though.
So why is it partly? Are you saying that Free Software Movement isn't also about having ownership over your own devices?
Because it absolutely is about that - no manufacturer should be able to tell what you can and cannot do with your own device. That includes what kind of OS you're able to run, what kind of programs, how much data you're sending to them, etc. Controlling your software is still stealing ownership from you because when you can't control what software are you running, you can't control what your device is doing.