How powerful a charger for a 2019 MacBook Air?

I have a 2019 MacBook Air. This is a 13-inch model with an Intel CPU. I believe it was the last Intel-based model before Apple moved to Apple Silicon.

The MBA is charged through a USB C port. I need to get a new charger, and I'm trying to figure out how powerful the charger should be. I'm currently getting by with some USB C chargers I have for iPads but they feel underpowered. Searching through Apple support documents, I can't find the wattage of the power adapter that originally came with the computer or what wattage I should ideally have for a new charger.

Thanks to anyone who can track this info down!