Tldr: not successful

So I did manage to get Forge to load on the Questcraft app but all I got was a black screen with three little loading dots and the sound of minecraft menu music in the background.

First I created a custom profile I named "custom" with 1.20.1 selected and default mods unselected. After closing Questcraft on the headset, I plugged it in to a computer and accessed the files through "Android/data/com.qcxr.qcxr/files". I then copied the "instances.json" to the pc and used notepad++ to edit it. Then I modified line 6 ("classpath") and changed where it said "...files/versions/1.20.1/1.20.1.jar" to "...files/versions/1.20.1-forge-47.3.7/1.20.1-forge-47.3.7.jar". --I also noticed that in the same line near the end, there are three spots where it calls for fabric mixin, intermediary, and fabric-loader-0.16.5.jar but I didn't change them to get this result--. Save the file and replace the existing "instances.json" file on the headset.

Now to get the Forge library files and versions files, you have to get that from an existing minecraft directly. Simply make a fresh .minecraft file, either by deleting and existing one or renaming the old one on a pc. Install and run 1.20.1 till you get to the menu screen, then close the game. Install Forge using the installer. Now open "libraries" in your .minecraft folder on your pc and copy everything inside to your "libraries" folder on your headset, merge files, don't replace. Also copy everything in your "versions" folder on your pc to your "versions" folder on your headset, merge files, don't replace.

You want to do this next step since it runs off a modified version of vivecraft. While vivecraft is avaliable for forge, the don't have a modified one for it to work with Questcraft.

On your pc, open "instances" in your headset files, navigate to custom and then mods. Delete the existing "Fabric-API.jar". Download on your pc, connector synentra, connector extras, and forgified fabric api, and copy it into your "mods" folder on the headset along side the "Vivecraft.jar" that was already there.

That will make Forge load fabric mods such as the modified vivecraft mod. Start Questcraft on your headset and launch the custom profile.

And there you go! You're at the same dead end I'm at. If you can figure out how to get any further or change some steps I made, let me know. --Also sorry for the way I formatted this, it's 3am and I have work at 6am lol--.