I totally understand what your problem is. You are not the first guy having such problem over this forum.
Please make sure your have done the first boot configuration on the host. The boot process will stuck until you finish the process.
The sdkmanager is asking your account and password of your NX machine and will use scp/ssh to send package to your NX to install the SDK. Thus, need to configure it on NX first.
If you already finished it but sdkm still get stuck in this page, then please move to ethernet. 192.168.55.1 is a virtual interface through the micro usb. Some users host may not support it, under such case, use etherent to send file will be more efficiently.
I am not sure if you are familiar with ubuntu. You can use any kind of interface, just in case your host is able to use that interface to ping and ssh to your NX.
Already removed the Pin 9 and Pin 10 in connector J14
So it will go to normal boot, not the Force recovery mode
Power off and power on the Xavier board.
Configure the Ethernet related properties.
Then again run the SDK Manager in Host
These look good. But just remember that, you don’t need to flash OS again in SDKM. Thus, only select the SDK. Please do not let it re-flash the board.
If you still have any question, please directly ask before trying.