IOMMU Enabled Issue with Isaac Sim

I’ve dual booted my machine with Windows and Ubuntu 22.04, and have installed Isaac Sim on Ubuntu. When I try to run Isaac Sim, I used to get a warning saying that IOMMU is enabled. After some time, I didn’t get the popup warning, however, the warning still shows in the terminal. That being said Isaac Sim loads and runs but I am concerned about using it as the warning message said it could cause other issues. Is it safe to use Isaac Sim in this scenario and is there any way I can disable IOMMU on Ubuntu?

I already tried these steps:

sudo nano /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash iommu=off"
sudo update-grub
sudo reboot

But the IOMMU was still not disabled.