Steam Deck natively recognizes the PS3 controller. Simply plug it in via USB, wait for Steam OS to recognize it, then unplug USB cable and it will work over Bluetooth without needing
Amazon.com: 8BitDo USB Wireless Controller Adapter 2 Converter Dongle for Switch/Switch OLED,Steam Deck,Windows,Raspberry Pi, macOS, PS5/PS4/PS3 Controller,Xbox Series X/S,Xbox One Bluetooth Controller OTG Cable : Video Games
Using a PS3 controller on a PS4 Pt. 1 - YouTube
How to connect any controller to Xbox? || PS5, PS4, PS3, Nintendo Switch Pro controller, etc. - YouTube
Ps3 To Ps4 Controller Converter - Temu
How to Use PS3 Controller on PS4 (Good Tips) - MiniTool Partition Wizard
Ps5 Controller Adapter Ps4 | Adapter Control Ps3 Ps4 | Wireless Controller Adapter - Accessories - Aliexpress
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How to Use a PS4 Controller on Xbox One
How to connect PS5 controller to PS4 console | Radio Times
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How to Connect a PS3 Controller to a PS4
I'm using this adapter for PS4 and PS5 controllers on PS3 and it's amazing! : r/PS3
Amazon.com: EJGAME Controller Adapter Converter Compatible with PS5/PS4/PS3/Switch/PC,Makes PS-5/PS-4/Xbox/Switch Joy Con Controllers Compatible with Your Switch/PS5/ PS4 Console : Video Games
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How to Connect a PS3 Controller to a PS4
Using a PS3 controller on a PS4 Pt. 1 - YouTube
USB Wireless/Wired Controller Adapter for Nintendo Switch/PS3/PS4/XBOX 360/PC - Walmart.com
How to use a PS5 controller on the PS4 - Dexerto
Can you use PlayStation Move controllers without connecting them to the console via USB, only through Bluetooth? - Quora
Type-C for PS3 from PLab on Tindie
Amazon.com: Brook Marine (without Battery) - PS4 Wireless Controller Adapter and Battery Pack for PS4, PS3, Switch PC, Android, Mac, iOS, Supports Turbo and Remap and 4 Extra Customizable buttons, : Video Games
Can I use a Playstation 3 controller in a Playstation 4 console? - Quora
Easy to Use PS3 Controller on PS4 - Driver Easy
Setting up PlayStation Controllers on the Raspberry Pi - Pi My Life Up
How to connect a controller to a PS3 - Quora
