Hi! Let me help you.
Does the cursor disappear in all apps (e.g., browser, Word, File Explorer), or only in specific ones?
When the cursor disappears, does it come back if you move the mouse or press a key?
Does the issue also happen on the login screen or BIOS/UEFI (before Windows loads)?
Are you using a laptop touchpad, an external mouse, or both?
If both, does the issue happen with both devices?
Have you tried a different mouse (or unplugging the external mouse and using only the touchpad)?