We have 4 shards (3 replica set each) cluster was running on 4.2

We have upgraded our whole cluster as suggested by MongoDB document, to 4.4, with FCV remaining 4.2

Before upgrade, we checked active mongoses were 15, for 4.2 version

Now after upgrade, we are seeing only 4 active mongoses, but when we checked manually that remaining mongos were working.

Please help here to get the right count.