Hi @YodelpopDevelop,
Thank you for your patience as I was checking this for you.
I have found this “Subscriptions” API but this is for the Commerce Hub.
I am not aware of another API to check if the account has Operations Hub enabled.
I’d like to invite a couple of subject matter experts to this conversation: Hi @zach_threadint, @MBERARD and @Teun do you have workarounds for this, please? Or do you know of another API call to get this data, please?
Also, if anybody else has anything to add and/or share, please feel free to join in the conversation 
Thank you very much and have a great day!
Best,
Bérangère