Linux: fedora 38 (6.5.5 and 6.5.6 see below)
KDE Plasma Version: 5.27.8
KDE Frameworks Version: 5.110.0
Qt Version: 5.15.10

DESCRIPTION
I ran some updates and for a while everything was looking good, but after some time login screen didn't show up, there was just a cursor and black screen (with dell logo in background)
Most recent kernel i have is 6.5.6 so I tried booting to 6.5.5 and the problem is similar, but after a moment the login screen showed up, so I took it from there and tried searching for the issue.

I booted back to 6.5.6 and started troubleshooting and I noticed the plasmashell wasn't running:

○ plasma-plasmashell.service - KDE Plasma Workspace
     Loaded: loaded (/usr/lib/systemd/user/plasma-plasmashell.service; disabled; preset: disabled)
    Drop-In: /usr/lib/systemd/user/service.d
             └─10-timeout-abort.conf
     Active: inactive (dead)

So I tried to start it but I got error message about abort(?) signal with core dumped.
Checked the status again:
× plasma-plasmashell.service - KDE Plasma Workspace
     Loaded: loaded (/usr/lib/systemd/user/plasma-plasmashell.service; disabled; preset: disabled)
    Drop-In: /usr/lib/systemd/user/service.d
             └─10-timeout-abort.conf
     Active: failed (Result: core-dump) since Sat 2023-10-14 11:03:25 CEST; 48s ago
    Process: 1590 ExecStart=/usr/bin/plasmashell --no-respawn (code=dumped, signal=ABRT)
   Main PID: 1590 (code=dumped, signal=ABRT)
        CPU: 65ms

Oct 14 11:03:25 fedora systemd[1391]: plasma-plasmashell.service: Main process exited, code=dumped, status=6/ABRT
Oct 14 11:03:25 fedora systemd[1391]: plasma-plasmashell.service: Failed with result 'core-dump'.
Oct 14 11:03:25 fedora systemd[1391]: Failed to start plasma-plasmashell.service - KDE Plasma Workspace.
Oct 14 11:03:25 fedora systemd[1391]: plasma-plasmashell.service: Scheduled restart job, restart counter is at 3.
Oct 14 11:03:25 fedora systemd[1391]: Stopped plasma-plasmashell.service - KDE Plasma Workspace.
Oct 14 11:03:25 fedora systemd[1391]: plasma-plasmashell.service: Start request repeated too quickly.
Oct 14 11:03:25 fedora systemd[1391]: plasma-plasmashell.service: Failed with result 'core-dump'.
Oct 14 11:03:25 fedora systemd[1391]: Failed to start plasma-plasmashell.service - KDE Plasma Workspace.

Found total of 3 core dumps each with the same result:

Thread 1 (Thread 0x7f1cd09d69c0 (LWP 1562)):
#0  0x00007f1cd2cb0884 in __pthread_kill_implementation () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007f1cd2c5fafe in raise () from /lib64/libc.so.6
No symbol table info available.
#2  0x00007f1cd2c4887f in abort () from /lib64/libc.so.6
No symbol table info available.
#3  0x00007f1cd32b1898 in QMessageLogger::fatal(char const*, ...) const () from /lib64/libQt5Core.so.5
No symbol table info available.
#4  0x00007f1cd396479d in QGuiApplicationPrivate::createPlatformIntegration() () from /lib64/libQt5Gui.so.5
No symbol table info available.
#5  0x00007f1cd3964cc0 in QGuiApplicationPrivate::createEventDispatcher() () from /lib64/libQt5Gui.so.5
No symbol table info available.
#6  0x00007f1cd34babcc in QCoreApplicationPrivate::init() () from /lib64/libQt5Core.so.5
No symbol table info available.
#7  0x00007f1cd396767f in QGuiApplicationPrivate::init() () from /lib64/libQt5Gui.so.5
No symbol table info available.
#8  0x00007f1cd41b43e5 in QApplicationPrivate::init() () from /lib64/libQt5Widgets.so.5
No symbol table info available.
#9  0x000055eff3607aeb in main (argc=<optimized out>, argv=0x7fff1eed3888) at /usr/src/debug/plasma-workspace-5.27.8-2.fc38.x86_64/shell/main.cpp:75
        format = {d = 0x55eff51ba160}
        qpaVariable = true
        app = <incomplete type>
        aboutData = {d = std::unique_ptr<KAboutDataPrivate> = {get() = 0x7fff1eed3780}}
        replace = <optimized out>
        corona = <optimized out>
        service = <incomplete type>


NOTES
I tried reinstalling gpu driver as well as qt and plasma-workspace, even some kde packages. Tried even reseting the configuration (https://wiki.debian.org/KDE#Reset_your_KDE_Plasma_configuration_to_defaults), nothing helped