Soport for ubuntu 22.04

Hi, I need your help. What is the official deb update source for Ubuntu 22.04? I have a Dell Inspiron 13 i5310 laptop with an 11th Gen Intel® Core™ i7-11370H @ 3.30GHz processor, and I need to optimize the system because I'm experiencing some issues such as touchpad freezing. Can you tell me what is the correct source to add to my system?