is there a way to detect when the player is looking foward and slightly to the left and right. | Bedrock Add-Ons | Page 1

You need to use ry and rym target selectors.
https://minecraft.fandom.com/wiki/Target_selectors#Selecting_targets_by_horizontal_rotation

Minecraft Wiki

Target selectors

Target selectors are used in commands to select players and entities arbitrarily, without needing to specify an exact player name or a UUID. One or more entities can be selected with a target selector variable, and targets can be filtered from the selection based on certain criteria using the target selector arguments.

#is there a way to detect when the player is looking foward and slightly to the left and right.