Yes, that's pseudoscience. Obvious fraud.

The brightness of the lines show that the sandstone rock was carved recently.

While it's not unusual for a petroglyph/pictograph site to be multicultural (the White Shaman site that I'm working on an paper about has at least three distinct cultural styles in the single panel), that one's just obvious garbage. And the "hieroglyphs" carved by "ancient Nile mariners"... no.

That's a bad fraud carved by someone who has no clue what hieroglyphs really look like. And then there's the mangled Christian symbols....