OnePlus - Nord - avicci - Documentation Suggestions

I installed /e/ on a brand new OnePlus Nord today following these instructions: Install /e/ on a OnePlus Nord - “avicii”. As I am new to /e/, and there is no explicit TWRP installation step in the instructions, I mistook the recovery system as downloaded (recovery-e-0.19-q-20211027142972-stable-avicii.img) for TWRP. I failed to find the “wipe” buttons described and, after much contemplation, finally resolved to upload the new /e/ firmware via adb without prior formatting.

Now the device is in a boot loop and displays endlessly the bouncing e logo. I can force power off (Vol+ and PWR for 10 seconds). Upon repowering I get the warning message about the unlocked boot loader and I can interrupt the boot process (PWR button), but nothing much happens after that.

Adb and fastboot cannot make a connection to the device.

Any chance to revive the phone? Any help much appreciated!

birnbacs