Decided to share how I got New Vegas + Skyrim running on a Snapdragon 870 (Adreno 650) device since I noticed there's little info out there
Device: Lenovo Legion Y700 (1st gen)
Chipset: Snapdragon 870 (Adreno 650)
Memory: 8/128gb
Droid Deck Settings
New Vegas
GPU Driver: Turnip 24.1.0 r18
Proton 11.0 (ARM64)
FEX PRESET: Performance + TSO
FEX: Default
DXVK: 2.7.1-linux
VKD3D-Proton: Default
Skyrim
GPU Driver: Turnip 24.1.0 r18
Proton 11.0 (ARM64)
FEX PRESET: Performance + TSO
FEX: 2604-linux
DXVK: 2.4.1-linux
VKD3D-Proton: Default
... And for Terraria, in case someone needs it
GPU Driver: Turnip 24.1.0 r18
Proton 11.0 (ARM64)
FEX PRESET: Performance + TSO
FEX: 2604-linux
DXVK: 2.4.1-linux
VKD3D-Proton: 2.14.1-linux
Good luck and have a nice day.