I have a NextJS Project that uses instrumentations.ts to create a websocket server. I am trying to access the connected clients from a server action however, any exported variables are defaulted to null even after they have been modified in a function.

WebSocketServer Code:

export let wss: WebSocketServer;

export function createWS() {
    if(Boolean(wss)) return wss;
    wss = new WebSocketServer({ port: 7777 });

    wss.on('listening', () => {
        console.log('listening on port 7777');
    });

    wss.on('message', (message) => {
        console.log('message received');
        console.log(message);
    });

    wss.on('connection', connectedToWSS);

    return wss;
}

Server Action Code:

'use server';

import { wss } from "@/utils/websocket";

export async function testWebSocket() {
    console.log(wss?.clients.size);
}

Instrumentation Code:

import { createWS } from './utils/websocket';


export async function register() {
    createWS();
}

I expect that the wss imported from the websocket file would exist after calling createWS from instrumentation, however wss only exists within the websocket file and I cannot import it without it being undefined.