P: Change HDR Stop limit on mobile?

I'm editing some photos in HDR on mobile, and wondering if it's possible to change the HDR stop limit on the mobile app. I can change it on desktop (below the normal "Light" controls when editing in HDR). However, can't seem to find it on mobile (iOS or iPadOS). I see find HDR on/off, previewing and editing SDR rendering, and visualizing HDR, but not HDR stop limiting.

Any HDR stop limiting that is put in place on desktop is respected/shown on mobile—the histogram shows that—but would like to be able to actually change the setting! Not sure if it's a missing feature or I'm just missing something.

Using:

Lightroom mobile v9.1.0, iPhone 12

Desktop editing on MacOS, Lightroom v7.1.2, MacBook Pro M1