Use a texture pack or resource pack made for Bedrock that highlights ores
Download the pack from a trusted source
Import the pack into Minecraft Bedrock
Activate the pack in World Settings or Global Resources
Join or create a world with the pack enabled
Use Creative Mode to fly and search for ores faster
Use spectator-like add-ons or behavior packs if available for your version
Enable cheats if required by the add-on or pack
Check that the pack is compatible with your Bedrock version
Avoid unofficial mods that may violate server rules or game terms