Discord-Minecraft integration
Solution 1:
Just a quick google search showed this result. A spigot plugin called DiscordSRV, compatible with versions from 1.7 to 1.16. From the plugin's page:
Intended usage
Using this plugin, you are able to give players the ability to chat in-game to chat with players on your Discord server as well as having people on the Discord server be able to chat with people on the server- this is useful for the situation of someone not being at their computer and being able to talk in-game.