Macbook Air was stolen

Hello everyone,
Today my 2014 Macbook Air was stolen. Find my Mac was enabled and I have also password on Startup screen. So i have put it into Lost mode with 4 digit password. So I wanted to know if iCloud lock for Macbook behaves the same as iPhone Activation Lock. Is it possible to bypass the password reinstalling macOS ? btw I have the latest macOS.

 

Yea i have applied it but still it is pending. So if they do not connect to the internet and make a restore using flash drive will they bypass lock? In this moment Macbook is offline and Lost Mode is pending. If they choose guest account and connect to Wifi it will be locked automatically.

 

ah okay, thank you. Next time I will enable filevault

 

*** Update ***
My Macbook Air was found today by police. Actually police put it in stolen database and they were able to find it when checking some individual bag. However all Macbook Air is f*** up, like scratches, dirt, he wrote with pen in it.
https://ibb.co/kKrjXx
https://ibb.co/eTr1Cx

 

Yea I have already cleaned it, I think I will gonna buy some laptop skin. It turns out that he/she opened Mac. So I opened it again cleaned everything, there were fingerprints and food pieces inside. Afterward I have run diagnostic test, so now everything was working fine. I think that there can be also water damage. Some interesting things. First of all, thief did not reinstall macOS, he entered using Guest account but did not connect to the internet. Webcam was closed by piece of paper. There were also some files e.g. Android crack games and so. Since my laptop was stolen from library, I think that some school kid took it. Since if it was stolen for resale there is no need to scratch.

 

Okay thank you, I will do clean install and will enable filevault.