Unfortunately my brain isn’t remembering the difference/connection between DPI and PPI? Is one in-camera and the other for printing?:)
That’s right! As so concisely explained by 99designs, “PPI describes the number of square pixels that show up in an inch of digital screen (usually between 67-300). DPI, on the other hand, is a printing term referring to the number of physical dots of ink in a printed document.”
If your printer prints at 300dpi and you set the resolution of your photo to 300ppi, then the on-screen pixels and the printed dots will equate to the same size. This article explains it well: https://99designs.com/blog/tips/ppi-vs-dpi-whats-the-difference/