How does Astro Close Database Connections?

I am not sure on how or if Astro closes database connections upon retrieval of data. Is it that the packages themselves take care of this or the connections “just” drop and it is up to the database server at the other end to timeout and close them?

Examples: Supabase as a backend service: https://docs.astro.build/en/guides/backend/supabase/ do not see any closing of database connections. Same on Astro DB: https://docs.astro.build/en/guides/astro-db/
plus in a codebase I saw with Mongo (not official): https://github.com/skolhustick/astro-mongodb/blob/main/src/lib/mongodb.js where for example the user retrieval here: https://github.com/skolhustick/astro-mongodb/blob/main/src/pages/users/index.astro “only” retrieves but never closes the connection.

I see code like this everywhere:

---
import { getAllUsers } from "../../lib/users";
import Layout from "../layouts/Layout.astro";
const users = await getAllUsers();
if (!users) {
  return new Response(null, {
    status: 404,
    statusText: "Not found",
  });
}
---

/* and in users.js */
import { Users } from "./mongodb";

export const getAllUsers = async () => {
  const users = await (await Users()).find({}).toArray();
  return users;
};

export const createUser = async (newUser) => {
  const user = await (await Users()).insert(newUser);
  return user;
};

So yes, my question is this: does Astro “never” close connections? Should it? Should developers add something, or do the underlying npm packages take care of it when the process ends?