Hi there, welcome to the forum.
Please pay attention to the template shown when you create a new topic: first of all we need information on your system specifications, with the terminal output, as formatted text, of your garuda-inxi.
You should take a look at thermals first, it can happen due to overheating.
Check for Hardware flaws
Before booting enter to BIOS/UEFI and check idle temperatures take a look at it.
While using my PC with Garuda linux once for every hour that continuesly kept shutdowning.
Luckily I found that it was my power supply causing it and swap it out with new one and the problem stoped. So in laptop check your battery too.