Hi @Lee21
Thanks for posting in our business forum.
It does not support disabling the NAT. For all TP-Link products, including home products, none of the native firmware supports this.
There are reports and requests about this feature but it's still under evaluation phase. Don't have a timeline for it.
Vote here: Disable NAT on the routers (i.e. TL-ER605 and TP-Link TL-ER7206)