What problem are you trying to solve?

Focus on the what and why of the need you have, not the how you'd like it solved.

On sharded clusters where we configure the connections via private links we loose access to individual shard cluster nodes. These nodes are no longer reachable via private link and all connections are established via mongos. However, some administrative operations such as enable profiler and collection of node statistics - like $indexStats cannot be performed without bypassing the private link connections. This is not great from a security posture or operational procedures.
This also becomes challenging since you are able to perform direct connections to individual nodes via private link in the case of clusters that are not sharded.

What would you like to see happen?

Describe the desired outcome or enhancement.

Allow nodes to be reachable via private link connection regardless if they are on shard cluster or just a simple replica set. Once you shard a cluster or if you are using sharding from the get go, you should not be operationally impaired.

Why is this important to you or your team?

Explain how the request adds value or solves a business need.

Collection of stats or profiling information is an important debugging and operational task that should that when needed requires fast response. On large fleets where security concerns and regulatory/compliance framework is in place, bypassing private links poses a big breach of the security posture. Should not be a route to follow.

What steps, if any, are you taking today to manage this problem?

By passing the private links by enabling ACLs and connecting via public cluster endpoints. No bueno!