Soft-bricked Poco X6 Bootloop and Stuck at Fastboot

Hi all.

I newly unlocked a Poco X6 (garnet) now. I flashed TWRP without any problem. I wiped data. I used OTG Flash drive to install the Xiaomi.Eu HyperOS stable release for garnet. Installation process displayed an error message saying it cannot locate /system_root. Then it continued the process and said it installed successfully. From the TRWP menu I selected Power Off and when I powered it on back, I faced a boot-loop.

Then I tried booting to recovery, now the touchscreen did not work...

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