https://fixyourandroid.com/how-to/check-if-your-verizon-phone-is-unlocked/
How To Check If Verizon Phone Is Unlocked?
Usually, Verizon has a lock period of 60 days after the purchase. So, you need to wait for 60 days before you switch to another network.
Read here the methods to check the lock status of a Verizon phone to know if your device is eligible to be used with another network.