Recurring formatter "Time Parts: End" setting doesn't do anything?

My goal is to use the Recurring formatter to display a Smart Date with date and start time, but not the end time -- so in trying variations on the different Recurring formatter settings, the Time Parts: End setting doesn't seem to work the way it does if I switch to using the Smart Date formatter instead. Specifically:

• If I use the Recurring formatter and un-check the End checkbox, it WILL show the end time. Example: Fri, Sep 22 2023, 10 - 10:30am
• If I use the Smart Date formatter and un-check the End checkbox, it WON'T show the end time. Example: Fri, Sep 22 2023, 10am

In both cases, I'm using the same Smart Date Format, default (Wed, Sep 20 2023, 10:10 - 11:10pm).

Apologies if there is an obvious way to output something like "Fri, Sep 22 2023, 10am" (no end time) that I'm missing.