Getmore is taking a long time to execute

Is there any way to improve getmore execution time? I was looking at the operations time, and it seems like the getmore operations are taking about 4 to 6 secs to execute. Is that ok? I looked at MongoDB doc to understand getmore; there isn’t much to know how to troubleshoot getmore operations, for example, can they utilize indexes are they affected by some other operations, etc. Please let me know if you guys have any documentation links to understand more about getmore and troubleshoot them. Any help will be appreciated.
Note: I suspect $changestream is affecting the performance but I am not sure.