Tracfone devices can be unlocked after 60 days of service.
Beware that up until recently in order to unlock a tracfone device you need to enter a code into the dialpad. So if you buy this device and you get 60 days of service, you may not be able to unlock it. Unless you have access to the phone app. A relative of mine ran into this issue on a waze device.
Important to mention that recently I've been told by tracfone (regarding the TCL Flip 2, but probably applies to all their devices) that you no longer need to enter codes into the phone, rather it unlocks automatically on its own after 60 days.
So I guess the smartest thing to do would be to call tracfone about the device you are about to buy.