I just picked one up, 2 extra front buttons 4 extra back buttons and rewasd officially supports it. So far so good
Huh, but all the LED settings in Preferences are disabled. From what you're describing, the issue may be rooted in the hardware, but let's check anyway if you have time :)
Once Steam Extended Xbox controller support is off, could you enable all the settings in Preferences - LED settings for Xbox Elite 2? They should look something like this.
Hm. As far as I recall, 5.11 was the latest one, but you should be able to change LED settings with your version of the firmware.
Please, try the following:
Turn off Steam Extended Xbox controller support (this will require a PC reboot), then try to change the LED settings within the config you're using (try setting Rainbow to Main layer) and Apply the config
And if possible, share a screenshot of Preferences - LED Settings for Xbox Elite 2. And a config that you're Applying :) You can send them to [email protected].
The link appears in reWASD for PC (you can see it if you click reWASD Junior icon at the bottom right), also, it is available in the store.
Please use this link: https://play.google.com/store/apps/details?id=com.discsoft.rewasd
Got your system info file, thank you! The only suspect is vigembus driver, and its creator has described how it can be removed (also, he recommended this tool for removal, I'd start there: remove the vigembus driver, reboot, check that it's not there and check on reWASD)
Once the driver is removed completely, reWASD (and the system) should see your controller as DS4 right away.