I don't have such a laptop, so I can't really speak for experience, but I can tell you what I know.
You definitely can use prime to render a program on the dgpu and display it on the igpu, this requires basically no configuration at all on wayland, I even did it on my desktop computer when Wayland didn't run on Nvidia. But I don't know if you can or why you would use the dgpu for everything instead of only selected programs (games).
What you really need is a compositor that properly uses both GPUs and can use the ports of both at the same time, hyperlaneld might just be bad at that. Gnome should be in a better position so you can start from here and see if gnome behaves better.
Also, are you sure you want to use a tiling compositor on a gaming laptop? Wouldn't it be a better experiment to just go with gnome? It's visually polished and goes well with trackpads.
A couple years ago it could never have worked properly, Nvidia drivers didn't support Wayland. Because Nvidia refused to implement drivers that followed the Linux semantic (which admittedly was outdated). About a year ago, after many years of work, they published a new semantic that Nvidia was willing to implement. Alongside that, a new Wayland protocol was added so that compositors could opt-in the new semantic when the driver supports it. So, to use Wayland with Nvidia you need both a recent enough Nvidia driver (I think anything after last July) and a compositor that implement the linux_drm_syncobj_v1 protocol. I'm not even sure hyperland supports it, so you should also look into that before continuing.
P.s.: gnome's mutter, and kde's kwin (which are the name of their compositors) both supported that protocol since the very day after it was released, so those are guaranteed to work if they are recent enough, unless if you are on Ubuntu lts which stripped it out for a pet peeve about adding features to lts releases.