Comment 28 for bug 1881319

Sorry, I don't upload my stuff here. Using a self build kernel is at your own risk especially there are no security-updates etc. You need to take care yourself if you are willing to do so.

Unfortunately there are a lot of outdated instructions around how to build a kernel.
I used this (in German) first https://wiki.ubuntuusers.de/Kernel/Kompilierung/ but it failed building the package. I found better instructions here: https://debian-handbook.info/browse/stable/sect.kernel-compilation.html and with make deb-pkg I was able to build and install the debian package.