Using Handoff in the Dock — Let’s dispense with Handoff first, since it’s a one-trick pony and not something that many Mac users who we know use. The Handoff section contains only a single icon and ...

you can force some of these icons to be hidden from the dock. Here's how. For this example, we will hide an application that everyone has installed by default on their Mac, the Safari web browser.

Designer Stijn de Vries has created a custom icon pack for some popular macOS apps like Twitter, Pages, Keynote ... and they’ll certainly make your Dock more consistent until apps get updated ...