This might be different based on model. On a MacBook Pro (Retina, 13-inch, Early 2015) with macOS 12.6.3, the cursor initializes in the top-left at bootup.

I think this started with Monterey, because on Big Sur and earlier, it always initialized in the center.

Correct me if I'm wrong, but I believe NeXTSTEP also initialized the cursor close to the top-left corner. So this might either be an homage to NeXTSTEP (similar to how the Clarus dogcow has reappeared in macOS Ventura), or a bug. My bet is on the latter.