Ubuntu 20.04 LTS (Server) comes with Linux kernel 5.4.0 by default. Try putting your own compiled kernel in this (Ubuntu 20.04). The kernel uses the vanilla kernel distributed by kernel.org.
sudo apt -y install make gcc flex bison libssl-dev
wget https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.4.tar.xz tar xfJ linux-5.4.tar.xz cd linux-5.4/ cp /boot/config-5.4.0-33-generic ./.config yes "" | make oldconfig make -j8 bzImage modules sudo make modules_install install
wget https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.6.15.tar.xz tar xfJ linux-5.6.15.tar.xz cd linux-5.6.15/ cp /boot/config-5.4.0-33-generic ./.config yes "" | make oldconfig make -j8 bzImage modules sudo make modules_install install
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