Redmi 4XMi logo appears for half a second (relocked)?

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Hello,I charged my Redmi while it was turned off and then disconnected it from the power.Now when I try to turn it on, the Mi logo appears for half a second and then it shuts off again. I can’t get into recovery, but I can access fastboot.Currently, I have an Android 13 Pixel Experience custom ROM installed.I checked via fastboot and the bootloader was locked again. Can I unlock it without deleting the data and regain access to my phone?Is there still any way to access the user data?