Humans are pretty adaptable. For example like many others, I became pretty reliant on Google Maps to get me wherever I wanted to go in the early 2000s. Later, I moved to Taiwan, and my phone didn’t have anywhere near the same capabilities - zero access to any of these smart map systems.
I found my ability to navigate and locate places spatially came back, just like riding a bicycle. I don’t think those skills permanently atrophy; I think they just go a bit dormant.
That being said, I can't speak for newer, more junior engineers especially the coming generations who will grow up always having had access to LLMs.