No invite to party or accept part bar

When in game there is no option for me to accept invite to party or send an invite to party. I can only hostile.

Also cannot create custom public games, I can only create zones / act / boss games

I’m on Switch and i accept invite on the Nintendo switch profile screen.

To invite others, I open up friend list in game and select my party. But currently it’s been buggy for me. It doesn’t appear immediately and requires me to toggle up and down or reopening to see my friend’s online list.

What would creating custom public game be like? I usually join random games so i have less info on this subject.