I recently bought an SONOFF DUAL R3 v2 and flashed tasmota 12.4.0 on it. Used the correct template {"NAME":"Sonoff Dual R3 v2","GPIO":[32,0,0,0,0,0,0,0,0,576,225,0,0,0,0,0,0,0,0,0,0,3200,8128,224,0
Support for Sonoff TX Series · Issue #5918 · arendst/Tasmota · GitHub
Sonoff Dual R3 v2 Power Monitoring Switch Module (DUALR3) Configuration for Tasmota
Episodes – Page 2 – SuperHouse Automation
Sonoff DUALR3 has a hidden secret - NotEnoughTech
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Support for Sonoff TX Series · Issue #5918 · arendst/Tasmota · GitHub
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Sonoff Dual R3 Lite Switch Module (DUALR3L) Configuration for Tasmota
Episodes – Page 2 – SuperHouse Automation
Support for Sonoff dualr3 · arendst Tasmota · Discussion #10793 · GitHub
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Flashing Tasmota on a Sonoff Dual R3 & Integrating With Home Assistant – Baldacchino Automation