I've made another example where you can make a comments section from a generator with the comments plugin to properly "grab" comments from another generator besides yours (e.g., comments from generators on my power-generator-manager), even ones that don't even have the comments-plugin built into it, without without using any direct iframe linking to the generator, that is all using just a simple execution of square-bracket-enclosed code in HTML (or lists). In the example page, you can even choose the generator source and the channel you want to load the comments from. And yes, the users would also be able to comment from the example generator, and the comments would be stored on the generator page the comments was taken from (so it'll also display on the same page).

I've also found the same technique long time ago, but using a different technique, and I've actually been using it in one of my abandoned generators, Comments Customizer (which now doesn't work anymore due to new default URL structure which the generator doesn't support).

Not to mention, if you have multiple comments section in your generator, all those comments will get replaced by the comments from the same generator you've set to grab them from. Also, the options from the generator the comments were taken from will not reflect to the comments from the generator, such as bannedUsers and adminPasswordHash, so you'll be able to see the banned users and see admin comments that are not flagged as "admin".