Order status dropdown not showing options


First post here. 
I’ve done a upgrade from 1.9 to 2.3.1. Now that I was  about to place the site online, I’ve notice that I can’t change the orders status, because the only option is “processing”. 

This goes for old order ( migrated ) and new ones. 

So… not even sure where to start to fix this. 

Everything looks the same as magento 1.9 but some tables are different for example in m1 there’s a Sales_Flat_Order while on m2 it’s on sales_order_status_history

Any help on what should I be looking, would be appreciated






Order Status