I would agree on the junior side of things. There is a higher threshold for the starting line for engineers, but for higher levels, design is by no means seen as a less prestigious role. Not in any sense of the word.

For salaries – see e.g. levels.fyi for quick comparison. Even Google – a company not really known for valuing design that highly: SWE L6 avg. = 520K USD. Product Designer L6 avg. = 515K USD.