why I’ve found a team but can’t join? | South Park: Phone Destroyer™ Guide

This can be because:

• The team is full. Teams can only have up to 50 members.
• The team leader set the team to “closed” so that it doesn’t accept new applicants.

You’re not yet awesome enough to join this team! Requirements can be New Kid level or PVP rank. You can check them at the team info panel.