Hi hasancakir1987,
Welcome to the AGL Community!
Your energy distributor (separate to AGL) are the company that attend your property every quarter to read your electricity and/or gas meter. As they're responsible for the supply of energy to your property as well as the upkeep of all related infrastructure (power lines, meters, etc), they have a vested interested in recording your energy usage as well as checking that this infrastructure is still operating in a way they'd expect.
In addition to the above, your energy distributor have no visibility of the meter readings you provide AGL which are only used for billing purposes. So, whether or not you provide AGL with these meter readings has no impact on whether or not a meter reader will attend your property.
Kind regards,
Jayden