Frankly don't know if this is possible to render in survival, but it would be incredible to be able to see the exact positions of claims

It's possible. Survival doesn't affect what can be rendered.

Map plugin is easiest, but not always an option for the player when using a modpack. Highlighted claim borders would save having to run back and forward with chunk debug on checking to see if Wild shows up. Failing that, even a 5x5 text summary of nearby chunks would help spot missed claim chunks.