Chat macros are disallowed. If you check the Hypixel Network Rules and Policies. More specifically, here, repetitive/spam messages are disallowed. If you also check here, Macros are a disallowed modification.

Are chat macros Bannable Hypixel?

Yes they are bannable. Chat macros allow you to immediately execute a command or chat without having to stop and open the chat menu, thereby giving you an advantage in game.

Are command macros allowed on Hypixel?

Well-Known Member

You are not allowed to use macros, which include things such as automated clickers and mapping chat or commands to buttons, regardless of if it is a Minecraft modification or external application."