I had the same problem, had trackpad replaced today and problem is gone.
Hi,   I bought a Dell inspiron 15 3511 with Windows 11 .   Since I bought the laptop I have issues with the trackpad , sometimes it works and sometimes it doesn't, in the end I always have to resort to an external mouse. - I updated the bios to the latest version last months: 1.11.0 -I updated all drivers from Dell. - I applied all windows updates. - contacted with Dell , the only solution is reinstall windows 11 ( 3 times at the moment) or remplace the trackpad ( few times too) and the last message from Dell support is "to investigate the bug and handle by our software team , it is not covered by the waranty you need to pay for it to get it investigate" I have screenshot . [IMAGE] WHAT? , I need to pay to dell to investigate a possible bug of the Dell software? Everything look like it is a bug in the driver or the OS . but Dell don't have to support the software if I don't paid. Any another user with the problem ? Can dell provide any solution ? I tried everything.      
Issue trackpad Dell inspiron 15 3511 Windows 11