I used to have similar mindset about this like you, but let's read what's an actual definition of R&D:

>Research and development is the set of innovative activities undertaken by corporations or governments in developing new services or products, and improving existing ones.

>R&D activities differ from institution to institution, with two primary models of an R&D department either staffed by engineers and tasked with directly developing new products, or staffed with industrial scientists and tasked with applied research in scientific or technological fields, which may facilitate future product development. R&D differs from the vast majority of corporate activities in that it is not intended to yield immediate profit, and generally carries greater risk and an uncertain return on investment.

and as you see "R&D department either staffed by engineers and tasked with directly developing new products, or staffed with industrial scientists and tasked with applied research in scientific or technological fields, which may facilitate future product development"

developing new products falls under R&D