is there a way to see what range the mega tourch has on in the game (im now always counting 64 blocks from the tourch to see where i leads) but is there a way to to toggle a way to see it with a keybind or command like for the light levels F7

maby include something with journymap (if people have it where you can show the area) sins it has intergration for mods

No, its not possible at the moment. It's on my todo list, but its not trivial to implement due to the high range of the torch (especially on low render distance, when chunks wont get rendered if you are too far away)

It's been a while, but I've started implementing a simple renderer that shows the volume of any Mega Torch or Dread Lamp after interacting with it in the world (Either Empty Hand or Vanilla Dye). Shift+Rightlick with an Empty Hand to disable the renderer for a given torch again.

This is currently only implemented for 1.20.1 Forge/Neoforge (Torchmaster 20.1.7). I'll test it for a few days before porting it to 1.21