Discord enable Experiments (js); works as of 03 Feb 2024.

gistfile1.txt

let cache; webpackChunkdiscord_app.push([["wp_isdev_patch"], {}, r => cache=r.c]);
var UserStore = Object.values(cache).find(m => m?.exports?.default?.getUsers).exports.default;
var actions = Object.values(UserStore._dispatcher._actionHandlers._dependencyGraph.nodes);
var user = UserStore.getCurrentUser();
actions.find(n => n.name === "ExperimentStore").actionHandler.CONNECTION_OPEN({
	type: "CONNECTION_OPEN", user: {flags: user.flags |= 1}, experiments: [],
});
actions.find(n => n.name === "DeveloperExperimentStore").actionHandler.CONNECTION_OPEN();
webpackChunkdiscord_app.pop(); user.flags &= ~1; "done";

Follow this guide to enable devtools in discord stable, use a BD plugin to do so, or use PTB/Canary.
VERIFY THE CODE YOURSELF. SCAMMERS ARE EVERYWHERE
paste it into the console and hit enter AFTER VERIFYING
Created this gist because the most recent one was outdated and you had to scroll down very far to find the patched version.

Credit to Zyrenth in this post.