To play with your friend together, there are Two methods:

Method 1:
To play together as a team, both you and your friend must be subscribed to the VIP membership. Then, select the "Play as a Team" option. After that, you will enter a session together as partners on the same team.

Method 2:
In the VIP Lounge, you can play together, but your seating positions in the session will be randomly assigned, meaning you won’t be on the same team. Both you and your friend must be subscribed to the VIP membership