I had the 2016 Zetec base model Ecosport, comes with 2 sets of keys, just press button key fobs to unlock/lock doors and a turn key in ignition barrel. Only higher trim models come with keyless and pushbutton start.
Same goes for the 2019 Face-lift model I have now have as it's a basic model, and again press button key fobs and a turn key in ignition barrel. I prefer that as to me its more secure than keyless systems. That's if we can say any car is really secure LOL
PS..If you only got one key, get back to seller for them to get you another, as keys are expensive now. If a garage or dealership they should give you one at their cost, if a private sale, well, good luck trying.