I did actually try with sdkmanager once, but I was unable to get it to detect my Jetson Nano. I’m not as familiar with sdkmanager though, so I could have set it up wrong potentially.
I had a USB cable from the computer with the sdkmanager connected to the MicroUSB port of the Jetson Nano (the one used for Device Mode). I was powering the Jetson Nano with a 5 V 3A adapter through the USB-C port. With this setup, I was unable to get the sdkmanager to detect my Jetson Nano, even after hitting refresh multiple times.
And even if it did, sdkmanager told me that there were no valid Ubuntu 20 images I could have flashed onto it for some reason.
There is no update from you for a period, assuming this is not an issue any more.
Hence we are closing this topic. If need further support, please open a new one.
Thanks
Is your host machine a VM?
Does your micro usb cable have data line but not just power line?