"Old" chargers are USB-A. Bundled cables are USB-C to USB-C, so you have to buy a new charger for it, or an USB-A to USB-C cable.
Additionally within the same brand you can have cheap phones with full suite of accessories - a charger, a case and screen protector, but once you go higher with a price tag you get less in a box.
Example: OnePlus Nord CE 3 Lite, which is now just a brand of Oppo, comes with a charger, a case and a screen protector, while their higher end model Oppo Reno 12 Pro comes with just a screen protector.
Samsung went even a step further and started making their boxes thicker, suggesting it comes with a charger, but in reality it comes with just a cable inside. Forgot which model was it though, iirc one of their Galaxy M line.