Hi I wanted to use the apex tracker overlay but I only see bronze rank and I am a Diamond rank… can you help me? 
It appears your account is reasonably new to us; we require that you play at minimum 2 games of ranked AFTER signing up before we display ranks.
The fairly simple fix here; leave your profile page open and hop into some ranked games! (Arenas and BR would need to be played separately!)
D4HS_CarnageFPS’s Recent Apex Legends Matches - Apex Legends Tracker