Minecraft Multiplayer Java

Hi! I was having issues on Minecraft Java Edition Multiplayer screen that my server is server is online i am owner and op of my server so what happens when my server is online when it is in waiting time i go in Minecraft java Edition screen to refresh it so it says that "this server is offline powered by aternos" i do not understand when server is in waiting time and i go to Minecraft java edition multiplayer screen it say your server is offline powered by aternos and also i do not change any type of settings of my server so there is something fault in Minecraft Java Edition screen. So please kindly resolve this issue. Thanks