There's a secret world type in minecraft called debug mode and you can generate it by shift clicking multiple times on the world type button. This is very useful for resource pack
Debug Mode | Minecraft Wiki | Fandom
Debug mode – Minecraft Wiki
Adjustable F3/debug menu font size – Minecraft Feedback
Debug Screen Addon v2.0.1 for Minecraft PE 1.16/1.17.10
How to get Debug Mode] "Minecraft 1.8" - YouTube
F3 Debug Screen Mod for Minecraft PE 1.8, 1.7, 1.6 Download