No, not on Linux ! Furthermore, now that I review the other case we see
I replied with a suggestion to rule out drivers … but the phone is reported to be already in bootloader but stuck.
@comlag does your device react, as if moving to bootloader / fastboot mode as Easy Installer collapses? Edit, you already said in your OP “after rebooting in bootloader”.
Android 12 is correct. The stable Android 12, S build used by Easy Installer was reported in the pipeline, but the dev version we see is released at Android 12, S: https://images.ecloud.global/dev/hotdogb/
Yes, take your time to read the instructions 3 times 
… feel free to ask.