hello how how can you help me to find network carrier to unlock my iphone 8

Read again -> Related Article

How to unlock your iPhone for use with a different carrier

& contact your carrier.

Look in Settings -> Mobile(Cellular) for a carrier.

It might also be printed on the SIM.

However, if you're not a current customer of the "locking" carrier, you'll probably have a tough time getting them to remove the carrier lock.