How to enforce safesearch on Google chrome and Internet explorer through group policy

Hi

We have windows 7 and windows 10 PC in our network. Recently when students searches particular image on google search, it  returns with unsuitable materials that is  unsuitable for a school environment.

We use Google chrome and Internet explorer and Is there any Group policy to turn the safe search on the students GPO.
I noticed very interesting, please see the attached picture PC -1. On the windows 7 PC s when imaged is searched on the Google chrome or Internet Explorer the "SafeSearch on is not on.

But at the same time if I go to a windows 10 PC (attached PC-2 image)  and open Google chrome or Microsoft edge it says "SafeSearch" is on and it doesn’t bring any inappropriate images.

Our filtering system is BLOXX and is hosted outside our network and not sure from where the "SafeSearch on" settings are picked from. Please help where could be the problem, any help to resolve this will be much appreciated.

Thanks in advance.
Safe-search-on-Windows-7-and-windows.png