From my own experience on my older Lenovo Legion with the optimus GPUs (intel integrated, nvidia 3060m dedicated) it was always a bit of pain.
Though I think I settled on using optimus-manager and with just the right tweaks it worked, when I wanted to game I restarted my whole desktop session to run on the nvidia gpu.
Are you using bumblebee/primus with optirun/primusrun ? back before these were the main pain points. (I am also assuming you are on X11 Desktop Environment - afaik wayland on older nvidia gpus is basically impossible. Also, are you sure you are using the proprietary nvidia driver and not nouveau? Nouveau is unusable for gaming.)
The article mostly says it was some kind of error but I can't help it, censorship and china lives closer together in my brain...