make the availability of everyone on the team available.
Not being the captain, I cannot view everyone else's availability for matches. It's quite possible I'm missing something but haven't been able to figure it out yet.
captain can change this to be visible to the team or just for the captains/co-captains.
Rob Rose commented
The captain has to edit that to make it available for all to see.
This is a setting that your captain can change for the team. Ask them to change it for you!