Many airline staff can see the loads of more than one airline. If that is you, add those airlines to your profile.
Open requests for the airlines you add then appear in the 'Requests' tab, alongside requests for your own airline. That gives you more requests to answer, and more chances to earn credits. It helps most if you rarely get a chance to answer requests for your own airline.
You can add up to 3 additional airlines. Here's how:
Tap the 'Menu' tab at the bottom right of the screen, then choose 'Profile & settings'.
Scroll down and tap 'Additional airlines'. Here you can add the extra airlines whose loads you can provide.
Once you reach 3, the search field reads 'Maximum additional airlines reached'. To swap in a different airline, tap the cross next to one you no longer need.