I just took delivery of my new Pixel 9a to replace my old 6a. I have successfully enabled OEM unlocking. I boot into the bootloader interface, the device state reads 'locked (unlockable). Then I connect it to my 6a and press to unlock the bootloader. Each time I get a message saying
'https://grapheneos.org wants to connect. No compatible devices found'
I have tried the cable that came with my new phone and my existing cable with the same result. I am using Vanadium, not in incognito mode.
I have a Pixel tablet which I have not tried because I cannot work out how to disable desktop mode which I understand is necessary for the installation process.
Can anyone offer any insight into what I might be doing wrong?