A missing mouse cursor is probably more likely to be to do with a fault with Windows than it is with your mouse. If you've got a wired mouse hiding away in a drawer (as many people have after switching to a wireless mouse), dig it out to see if it will work. If it does, you'll know that the problem rests with your wireless mouse; if it doesn't the problem is with Windows.
If you've not got a wired mouse about the place, try to borrow one from a friend, neighbour or colleague. If all else fails, nip down to Asda and but one for £4:
https://groceries.asda.com/product/computing-accessories/onn-black-wired-optical-mouse/1000033144335
(It's always a good idea to have a spare mouse handy anyway. I've got several of them).
If the problem turns out to be with Windows, try the solutions here:
https://answers.microsoft.com/en-us/windows/forum/windows_10-hardware/how-to-fix-cursor-disappeared-in-windows-10/342eb3df-c60f-44c1-b038-f14bf5c15e19
If the problem turns out to be with your wireless mouse, try updating the driver for it:
https://support.microsoft.com/en-us/windows/update-drivers-in-windows-10-ec62f46c-ff14-c91d-eead-d7126dc1f7b6
(You'll need to use your wired mouse to complete the task).