Is AI used in your workflow at all? If not, the sheer quantity of these is incredibly impressive. I see to me what look like a few potential telltales of AI generation (no judgement, and certainly no offense meant!) but the original resolution and the heavily dithered upscaling indicates otherwise.
Anyway, I like these regardless, but if these are actually hand pixeled, I am somewhat in awe of you. That is a TON of pixel art landscapes to drop for free and Creative Commons.