Minecraft PS4? - 7

Me and my buddy created a Minecraft map together on his console so it's his. I would like to play on it when he can't / can't.
But like when he sends me an invitation, it expires after 1 hour.
he can't put himself online either

How do I always get into his map (I know that he has to be in the map) but how do I get into it without him having to send me a new one when the invitation has expired and I'm no longer in the map

This is difficult because online life on PS4 is not as structured as it is on PC.

You would either have to change the map to a server (or realm) so that you can enter it at any time, but put the map online, or you make a copy of the world, save it on a USB stick and load it onto your console. But that would be very cumbersome and in the end you would not be playing on the same but a copied (separate) map.

So I would say now that there's no other option, but I think if he gives you his acc. There and saves his map online, it should be possible to access the map, but I can't tell you exactly how that works.

Will be difficult on the ps4 except when you get his account data because you can I think then play on his map, unfortunately I don't know another method