My isp requires their wifi router to be used in my network. As such, this causes a double nat issue when I use the er605 for failover internet between the isp and starlink. 

ISP+SL > er605 > BE63 in ap mode

I can bridge the isp router but I'd like the be63 deco system to not be access points and function in router mode to benefit from all features. 

Is there a way to either disable nat on the er605 or connect everything in a different order to achieve this?