/sayas <player> <text>

Say something as another player/entity

player: The player/entity you want to talk as text: The text you want to say

/runas <player> <command>

Run a command as another player/entity

player: The player/entity you want to talk as command: The command you want to run

/shout

Toggles an announcement name tag

This project will be updated to 1.16 when Mcreator 2020.6 coomes out