There are two primary ways to disable SimLock, depending on whether the change is temporary or long term.
Disable SimLock for an extended period
Go to the Products page in the admin panel and select the bay you want to modify. In the simulator settings you will find a toggle to disable SimLock for that bay.
Temporarily disable SimLock
If you want to turn off SimLock only for a short period, create a blocking for the relevant time. A blocking prevents SimLock from engaging during the blocked period. You can find a guide to creating blockings in the Blockings section.