Shimano XTR M9100 Rear Derailleur is compatible with SRAM Eagle 12 Speed! - Kustom Bikes
Testing Video: Shimano XTR RD-M9100-SGS & SRAM Eagle 1X12S Shifter | Now, there is a question that if the "SRAM shifter can fit with Shimano 12S rear derailleur?" Here is the video
Battle of the Drivetrain Big-Hitters: Shimano XTR M9100 vs. SRAM X01 Eagle | ENDURO Mountainbike Magazine
Shimano XTR M9100 Review - Drivetrain Long-term Test | The Loam Wolf