If you're worried about getting a free fast charger you probably can't afford an iPhone anyway. The thing is nothing in the box is free so if they include a fast charger it's added to the price. If Apple included fast chargers you would have people complaining about Apple forcing them to buy a new fast charger every time they get an iPhone. Of course that would lead to someone suing Apple for it. You just can't please everyone
I use a wireless charger I bought shortly after I got my XS Max. I sit my phone on it before I go to bed and it's fully charged when I wake up.