According to your log, OBS is running on your Intel UHD 630. In fact, the log doesn't even show an Nvidia card recognized.
18:07:03.330: Initializing D3D11...
18:07:03.330: Available Video Adapters:
18:07:03.331: Adapter 1: Intel(R) UHD Graphics 630
18:07:03.331: Dedicated VRAM: 134217728
18:07:03.331: Shared VRAM: 4231301120
18:07:03.331: output 1: pos={0, 0}, size={1920, 1080}, attached=true
18:07:03.331: output 2: pos={0, -1080}, size={1920, 1080}, attached=true
18:07:03.334: Loading up D3D11 on adapter Intel(R) UHD Graphics 630 (0)
18:07:03.346: D3D11 loaded successfully, feature level used: 45056
There's no "adapter 2" listed there, which is what I would expect to see.
Is this a laptop?