Custom Frequency compliance, raw Lora

I am setting up a private lora network (not LoraWAN) in the 868MHz range, and I am wondering if it is possible to set 3 Gateway channels in the g3 (869.4 – 869.65 MHz): 10% band with 125KHz Bandwidth?

For example:
1: 869.4
2: 869.525
3: 869.65

What is the minimum margin possible between frequencies?
How does the bandwidth affect the legal limitations?

Thanks in advance!

I am also stuck at this point. The TX and RX are showing random frequencis in lorawan Live Frames