Internet Speed Direct Connect to Modem v. Direct Connect to Orbi

[BEETCH]

I tested my internet speed directly wired to modem and got to 400Mbps.

Then I connected the modem to the RBR50 and connected the same computer via ethernet and did a speed test and got 100Mbps.

When I run the speed test on the orbi app it's consistently around 100Mbps.

Is there some kind of setting i need to toggle to get the same 400Mbps speed thru a direct connection to Orbi as I do when i directly connect to the modem.

[FURRYe38]

What Firmware version is currently loaded?
What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too?