Macro mouse?

Hello I'm very new to this whole arduino stuff.

I want to make my own custom macro keyboard I have watched I have read a few guides and it's starting to seem pretty clear to me

But I haven't seen a single guide on how to make a macro mouse.

Reading a bit it seems that making the mouse work "normally" would be quite difficult.
But wouldn't it be possible to separate the mouse movements and key presses?
Making the key presses go trough the arduino as an keyboard.
And the mouse movements directly to the pc?

But I haven’t seen a single guide on how to make a macro mouse.

Maybe that is because you have not defined what this means?

Using an Arduino Leonardo of a Micro you can program them to look like a mouse.