Hi there,
I have AMD 5800h + Nvidia 3060 laptop on HP Omen
I have been using optimus-manager for more than an year now, and it has been working flawlessly.
Edit :
Just enter
sudo pacman -Syu garuda-optimus-manager-config
And install it and restart.
Now, you should see
icon in your panel.
Right click on it and select switch to Nvidia or hybrid, whichever you want.
You must login in again now, and you are good to go.
I don't know if it's best practice. But it just works for me.
PS : use command
sudo pacman -Syu garuda-optimus-manager-config
because dependency issue.