A:Answer I'm not sure what you mean by a mouse attachment, however, as you mentioned, it does have limited ports, so since I needed 4 USB ports (mouse, external hard drive, printer, and headphones), I purchased a USB C "docking station" that has 2 additional USB ports (a 2.0 and a 3.0) and another USB C port, so it gives me a total of 4 USB ports. I also have another USB C docking station with 3 additional USB ports for my other laptop. They're fairly inexpensive and very portable. It also provides an additional HDMI port if you want to connect dual monitors.
This is considered a gaming laptop. The only game I've played so far on this is Roblox with my granddaughter - it performed just fine.