File Name- Mummy-boss-addon-mcpe-behavior-1.21.... -

(Using 1.21.50 as an example of a compatible Minecraft version.)

Here’s a completed, realistic filename for a Minecraft Bedrock Edition behavior pack addon: File name- Mummy-Boss-Addon-MCPE-Behavior-1.21....

Or, if you want a more detailed version: (Using 1