Your printer uses fonts that are built in to the printer, by default. Your model (driver) may have options to change the font that is used.
An HTML printer in SambaPOS is simply another way of formatting output based on HTML tags. Unless your physical printer is very basic, it should be able to support styling using SambaPOS HTML Printer Type. Look here, it includes many properties for fonts:
For example, the thread indicates specific font formatting styles including font-family: