From what you write and show its not possible to tell what you are doing. You showed part of a screen a used terms like "Panoramic Mode" and doing impossible things "add layers to a pano layer" You have not identified what Photoshop version you are using or what Photoshop features and tools you are trying to use. I have never seen any documentation about a Photoshop "Panoramic Mode" or layer kind "pano". I know there are many Adobe Photoshop 2021 know issue listed for problem with 3D are you trying to use Photoshop 3D spherical panorama. https://helpx.adobe.com/photoshop/kb/known-issues.html
There threads in this forum that show steps to patch spherical panorama tripods and sky.