I've just installed SRAM Eagle AXS (1x12 electronic gearing) on a bike. My Edge 1000 sees the shifting sensor no problem, but when I go into sensor details to configure the chainring size and rear cog sizes, it won't allow me to select a single front chainring or more than 11 cogs for the cassette. Gear Presets / Custom for the front doesn't have any way to remove the second chainring - I've just put in the same chainring size for both. For the rear, there doesn't appear to be any way to get the 12th cog into the equation.
WTF, Garmin, this stuff has been out for half a year now, and 1x setups on MTBs and CX machines for a lot longer than that!