Lan multiplayer option is not working

Sir in Minecraft lan multiplayer option isn't supporting. i know little bit how lan multiplayer work. in Minecraft when i created map i go to multiplayer option and turn on multiplayer mode and also i turn on lan multiplayer option. i don't think any other steps necessary to play lan multiplayer mode but there is something wrong. when i created that map and enter the world and when i pause the game and go to the setting there multiplayer option is disabled and lan multiplayer option is not showing there. This isn't all when i connect my my internet and then i create the world doing the same process then go to the setting i see that multiplayer option and lan multiplayer option is also showing and even when i turn off the internet lan multiplayer option is still visible and other players can easily join the world. That's not all when i reopen the game without internet and go to the world again it shows multiplayer option is turn off and lan multiplayer option isn't there. And also even i reopen the world by connecting internet there shows multiplayer option is enabled but lan multiplayer option isn't showing 😕