I have done this as well…also on accident. Take a look under the “Shading” drop down (top-right, above the xyz gizmo) and make sure you don’t have something like background -> Viewport selected to a black color.
Thank you HardRooster. I don’t remember changing this setting though.
Same here, but it got changed. I don’t know if it’s tied to some hotkey combo I accidentally smashed or what, but that was my issue, and that’s what fixed it for me.