iPad charging

Yes. You iPad mini6 supports USB PD (Power Delivery).

While your iPad will charge at its maximum supported charging rate (~20W), you can safely use a higher-rated Power Adapter - however your iPad will derive no benefit.

A higher-rated Power Adapter becomes useful when connecting external USB devices via a powered USB hub - as the Power Adapter can provide sufficient power for the USB hub plus connected USB devices (which all require power) and maintain additional capacity to simultaneously charge the iPad.

Yes. The charger doesn’t “push” power; it just supplies the power “drawn” by the device.

Regards

Giulio