You need a seperate port from the server for this to work, and that's too many people for too little available ports, so that's probably why they haven't added it.
Chatmanager is outdated, currently v3.6.4 but v3.6.5 is already out.
https://www.spigotmc.org/resources/52245
SuperVanish is outdated, currently v6.1.5, but v6.1.6 is out.
https://www.spigotmc.org/resources/supervanish-be-invisible.1331/
Please Minehut gods. We need a decent anticheat solution and this one is it. Completely free, super easy.
To keep this from going unnoticed REPLY!!!!!! Show your support!!!!
https://www.spigotmc.org/resources/wither-anti-cheat-1-13-x-1-15-x-paper-tuinity-support-free-accurate-optimized-anti-cheat.68657/
Dynmap has been updated for a while, when downloading just dont download the Latest file, go into the files tab and get the latest beta one you see there. It works with 1.15 as I've used it with other server hosts on 1.15.1
Please add ASAP https://dev.bukkit.org/projects/dynmap