recovery mode – Unbricking Lenovo Tab M10 (X606F)

For the purpose of flashing custom ROM I flashed Lenovo Tab M10 FHD Plus (X606F) with Android 9 ROM. I used SP Flash Tool. Now the tablet won’t power on. Pressing buttons does nothing. Can’t invoke fastboot nor recovery mode.

Red LED indicating charging is the only thing the tablet is giving me now.
I’ve tried to restore the device using official Lenovo’s Rescue Tool.
Process of restoring gets stuck on 40% and won’t go on.

Hard reset (pressing and holding volume buttons + power button for few secs) isn’t doing anything.

What else I can try ?