Mlem doesn’t have this option just yet, but we’re adding it the next beta. Memmy and Arctic have had it for a while.
Adding such an option is very easy to do for iOS apps - Apple provides a simple API for it, so we just have to add a settings toggle. I’m not familiar with how it works in Android development, but it may be more complicated.
Yeah, it’s rather inconsistent. I opened an issue for it a while ago.