Monitors for load balancers not orgins

Hi, we are testing Cloudflare traffic load balancer to replace our current Route53 configuration.

I have created a couple of load balancers and a group of pools, each one with some servers. So far so good.

Now, each balancer has its own related app, therefore it own related monitor. I thought monitors were specific to load balancers, and not the global pool. Is there a way to achieve this? What is the point of having 20 balancers slot if I can not granularly check them?

Thank in advance,