Report Unfinished Master's Degree on PostBacCas?

I’m applying to Post-Bac Career Changer Pre Med programs. Back in 2018, I started a Master’s degree in clinical mental health counseling before realizing that I wanted a “higher” degree. After finishing one semester (with excellent grades), I dropped out of the program.

I am worried that this won’t look good to a post-bac program: they may see leaving a previous program as evidence that I won’t be committed to finishing THEIR program. This isn’t true, but they may think it.

Do I need to mention this semester of a Master’s program or include transcripts from it in my PostBacCAS application? If I don’t include it, would they be able to find out that I had enrolled in those courses?

Thank you for your time, everyone.