If it is just personal, then no need to ask, you can use it. You can use it in public packs as well though

You just advertised your own pack because we had the same Idea. Didn't matter to you that our panoramas look different. Yes we use same shaders in it. However, we have different shader settings. You know why we both use Complementary Reimagined? Because these are the most popular shaders that give the most enhanced vanilla experience unlike other shaders, that make game more realistic in some ways. I made my panorama on 1.20 when it came out, without using any mods except Sodium and Iris, and posted here 2 versions of it(day and night versions to be precise) without any idea about your pack existance. So don't tell me that deleting someone's advertisement is disrespect to members of PlanetMinecraft.

You haven't, as you said, reveal anything. If I had any of your assets it would be a different story, but you just decided to advertise yourself in someone else's comment section, because you felt so.