GNU/Linux Ubuntu 21.10 Desktop Installing Latest Kernel Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install the Latest Linux Kernel in Ubuntu 21.10 Impish Amd64 GNU/Linux Desktop.
Especially relevant, here are presented all the Best Alternatives for a Desktop Setup:
Xanmod Kernel
Liquorix Kernel
Mainline Kernel GUI Updater
But as a possible Alternative, you can try directly to Download and Build Linux following this Guide: How to Install Kernel from Source on Ubuntu.
GNU/Linux Ubuntu 21.10 Latest Kernel Installation Guide
XanMod Kernel Ubuntu 21.10 Installation
Liquorix Kernel Ubuntu 21.10 Installation
Mainline Kernel Ubuntu 21.10 GUI Installation
Liquorix Kernel Ubuntu 21.10 Installation
Mainline Kernel Ubuntu 21.10 GUI Installation