As long as as humans haven't succumed to brainrot and still have capacity for math and logic, we can figure it out. It's encoded, not encrypted.

The classic problem of long-term nuclear waste warning messages is about conveying information over cultural barriers. This is a concrete data type, not interpretation of vague contexual meanings from pictograms. Math and logic don't change while cultures do. Images are far more retrievable than the meaning of an image.