Scroll to Inputs
Scroll the mixer window to at least the first channel strip that has an input assigned. Probably a whole lot more useful to scroll to auxiliaries which can be far away. I guess if you are looking at the aux strips you might want to scroll back to the inputs….
Channel strip types in Logic Pro – Apple Support
When you have more channel strips than can be viewed in the Mixer at once, scroll the mixer in Logic Pro by doing one of the following: