Enable/Disable Groups ⇧G ⌃5⃣￼
The group “clutch”. You need to disable groups when you want to edit/change only a single channel in a group.
Overview of groups in Logic Pro – Apple Support
Before mixing, you may find it useful to create channel strip groups. You could, for example, group all drum channel strips under one drum group. This would allow you to adjust group parameters (volume, pan, mute, solo, sends, and so on) using a single control, while still maintaining the relative parameter values of each channel strip. Using the groups feature, you can: