Hello! After pressing the wrong shortcut (without looking) my rig disappeared.
I thought it was one of the classics: Hidden in Outliner, Moved bones to a different layer, Shift H, Hid Bones in the Overlay tab but no. Its none of these
That you may have isolated the mesh (probably) - all the objects are not technically hidden, but you can only see those that were selected when you entered Local view.
Damn thank you so much! Years ago I came from Maya where I used this all the time, somehow along the way I forgot this existed in the first place, since I always use shift+H