Short answer: Use the profile menu to report — you can also block.
Report
- 👤 Open the member’s profile.
- ⋮ Tap the three dots (top right).
- 🚩 Select Report user (choose a reason, add a short note).
Block (optional)
- 👤 Open the profile.
- ⋮ Tap the three dots.
- 🛑 Select Block user.
💡 Tip: Don’t engage. One clear report is enough.