The DualSense successor would feature a charging case-like compartment in the back where you can place your earbuds and charge them.
This article explicitly states where Sony wants to put the charger. Illustrations done to drive article views are not a good replacement to actually reading the text.
Referring to some of the mock ups like this one:
https://gamerant.com/sony-new-ps5-controller-with-slots-for-charging-pulse-explore-inzone-earbuds/
It replaces the touchpad with the earbud charger.
The article says the ear it charger is under the touchpad.
This article explicitly states where Sony wants to put the charger. Illustrations done to drive article views are not a good replacement to actually reading the text.
FTA:
“The charging slot could appear on the front, back, sides, top, or bottom of the device.”