Newly released MacBook Air tech specs:
So this means - Air can be used with an XDR display at full resolution and without any external GPUs. Although I won't be buying an XDR display anytime soon with the recent market crash - it's a good news.
Video Support
Simultaneously supports full native resolution on the built-in display at millions of colors and:
One external 6K display with 6016-by-3384 resolution at 60Hz at millions of colors, or
One external 5K display with 5120-by-2880 resolution at 60Hz at millions of colors, or
Up to two external 4K displays with 4096-by-2304 resolution at 60Hz at millions of colors
So this means - Air can be used with an XDR display at full resolution and without any external GPUs. Although I won't be buying an XDR display anytime soon with the recent market crash - it's a good news.