You could switch to Zorin 17 and there install there install the 5.15 LTS Kernel. That should work. Unfortunately this Kernel isn't available in the Repo's. You could only install it when using the Mainline Tool:
You could switch to Zorin 17 and there install there install the 5.15 LTS Kernel. That should work. Unfortunately this Kernel isn't available in the Repo's. You could only install it when using the Mainline Tool: