this is your way to reel in a recruiter or hiring manager. Focus less on the technology, focus on creating the product. don't choose a technology because you want experience in that technology. choose a technology that makes sense for the project, and then when you talk about this project you can talk about these decisions as if you were architecting a project at work. You wouldn't choose a tech stack just to learn, you would choose the right stack for the team.
There’s a whole chapter on project management where we will talk about actually building your personal project. This section is strictly about