I downloaded the fx3load package, however I was not able to build it due to my limited linux knowledge. However I decided to just download the SDK library directly from qhy and follow their instructions: www.qhyccd.com/html/prepub/log_en.html#!log_en.md . I ran the "sudo bash distclean.sh" to get rid of the old one and then installed the new one with "sudo bash install.sh".
Now when running "lsusb" the camera was detected correctly: Bus 006 Device 002: ID 1618:0463 QHYCCD QHY5III462-211011.
However when running the test script "/usr/bin/qhy_ccd_test" I got the error: "libqhyccd.so.22: cannot open shared object file: No such file or directory".
So I just copied the missing file from the one which I still had from the build directory: "sudo cp ~/Projects/build/indi-3rdparty-libs/libqhy/libqhyccd.so.22 /lib/aarch64-linux-gnu/"
Now the camera works perfectly in kstars.

Thank you guys for helping me out here.

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