https://wccftech.com/m1-mac-models-recognize-display-connected-egpu/

When three M1 Mac models were unveiled by Apple during its November event, there was a moment of relief as the M1 MacBook Air, M1 MacBook Pro, and M1 Mac mini featured Thunderbolt 3 ports. Unfortunately, it was reported that none of these models have eGPU support, meaning that if you want that additional graphics horsepower, you’ll have to look elsewhere. However, that doesn’t mean you should throw out your existing external GPU enclosure, as a new finding reveals there might still be use for it yet.

An image showing the Pro Display XDR connected via a Blackmagic eGPU was possible with one M1 Mac model. In fact, it was also shown that the GPU is detected, which in this case was the AMD Radeon RX 580. This shows that eGPUs have absolutely no issues being detected by Apple’s latest Mac models. It’s the lack of driver support preventing users from taking full advantage of this hardware.