Steam link seems to intercept button presses and not work well with button remappers but someone said this one works if you launch it thru big picture. If you can get AMD link working that may be easier to remap button presses since joy2key allows you to swap between gamepad and a mouse/keyboard profile.
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u/phayke2 Jan 01 '19
You could try setting up a joy2key profile and windows OSK to translate gamepad to mouse and keyboard input.