Like the Pro Controller, the new back buttons are GL and GR that can be remapped to other buttons, the listing says. However, the Switch 2’s Charging Grip, at $34.99, is cheaper than the Pro Controller, which costs $79.99, so the grip is a more affordable way to try out those new buttons.
However, as with the original Switch’s charging grip, this new grip only charges your Joy-Con while it’s plugged in. “Attach the Joy-Con 2 controllers to the Joy-Con 2 charging grip to use as a classic-style controller – or a handy charging station with the included USB-C charging cable,” the listing says.
I wish the new charging grip had an included battery. But the ability to charge the Joy-Con while playing and use the new back buttons does make it a step up from the basic Joy-Con 2 grip included with the Switch 2. (Though the back buttons do look quite small.)