Minecraft multiplayer at all times?

I have a world in Minecraft with my girlfriend, on which we're already relatively far (Minecraft Bedrock). My girlfriend created the world and I only get in when she's in. Can you somehow change that so that everyone can come in if they want?

No, I don't know any trick

There must always be a computer on which the server can be started.

In your current case, this is your friend's smartphone, computer, console.

If you want to have a so-called 24/7 server (24 hours a day, 7 days a week), either your girlfriend has to be active all the time or you move the server to an online host.

The second option mentioned costs money and is therefore not feasible for everyone.

Thank you very much.

No, because this is a local server that can only be entered when your girlfriend releases the world or enters it. As an alternative, you can also rent a server for a fee, but as I said, this costs money.

No, that's not possible, I think it works but with a realm that you have to buy monthly