PS5 DualSense vs DualShock 4: What's different? | Tom's Guide
Early PS5 DualSense Prototype Controller Discovered, Works On a PS3 | N4G
The PS5 DualSense Controller Works With The PS3 And Nintendo Switch But Not The PS4
PS5 DualSense Controller Works With PS3 Consoles
PS5 DualSense controller works on PS3 | GamesRadar+
PS5 DualSense controller is compatible with PS3, not PS4 - MSPoweruser
For those that don't want to use the Dualshock3/SixAxis - I highly recommend the Brook Wingman XE. I love the PS3, but the experience is just another level with the Dualsense IMO. :
PS5 Controller on PS3 - the PS4 Can't Do This with the Dualsense Yet - YouTube
How to wirelessly pair PS5 DualSense controller with Windows/Android/Mac/PS3/iOS - VIVIDBAY
How To Use The DualSense With ALL Features On PS3 - YouTube