It is possible to change it.
But you need to know how to fold a folding bike
If you change the front fork, that is to say, the FC is changed, then the ratio of FC and RC will be wrong and it will not fold. stand up, or cannot stand after being folded. Or the handlebar touches the front fork after folding.
If you don’t consider the folding aspect, it’s no problem. It’s just that the angle has changed a little, so it won’t affect it.