Best ways to “show process” in portfolio?

After attending a BUNCH of portfolio reviews, the common through line for standing out has been “show more process in your work, especially since you are a junior in the industry.” However I’m worried about putting a bad impression by showing my bad sketches/written processes (I don’t think images of Google docs is necessarily what they mean). I have tried to explain it in writing beneath the finished project elements, but reviewers have also tended to not see it until I tell them explicitly.

When I try looking at other people’s portfolios, they are usually do not show process; either they are also juniors with portfolios without process/are very flashy or senior enough that they aren’t showing much beyond 3-4 images.

Does anyone have any advice on how to show process/examples of portfolios that show good process work?