The Suggestion

This would essentially replace the existing "Twilight Forest" advancement for entering the Twilight Forest. This would be the first advancement in the mod, and the only one visible without doing anything else.

The main idea is that the description of the advancement would guide you through creating the portal, specifically what activator(s) to use. The description would be something like this "Throw a [List item(s) with twilightforest:portal/activator tag] into the portal frame and jump in!"

I plan on using KubeJS to make a custom advancement that displays the activator for my modpack for this reason, and if I remember I will edit this suggestion with a screenshot to show what I mean, but I think it's pretty straight forward.

Why Should It Be in the Mod?

The purpose is to provide players with in-game documentation of what activator(s) to use, which would be especially helpful in modpacks. Since it relies on the tag, it would be dynamic and based on each modpack's specifications. Players rarely even read your pack description so that usually isn't sufficient, and it's a common issue players struggle with, especially if they don't know to search for the tag. Modpacks with an explicit quest system can circumvent this, but such systems are often out of place in other modpacks that still want to gate the Twilight Forest behind certain things.

By making it the only advancement visible to players who haven't actually been to the Twilight Forest, it also focuses them in on what activator(s) they can use.

Obviously this won't entirely fix people complaining about not being able to activate the portal, but I think it will fix a lot of that and I don't believe it would be very hard to implement so I think it's worth it.

Please Read and Confirm the Following

• I have confirmed this suggestion is unique and has not been suggested already.

I personally dont think this is necessary in the base mod. The mod page already explains how to make the portal and its the first thing you see when you go to download the mod. A modpack changing the activation item is on them to explain, modifications to the mod's mechanics are not for us to account for here.
If you want to include something like that in a pack youre making we do actually have an advancement trigger that fires when you make a portal. Just use twilightforest:make_tf_portal as your trigger and youll be set