Is it possible to add a footer to the MaterialDateRange Picker?

I'm pretty sure this is impossible, but I just wanted to check before I use a 3rd party library. The DatePicker doesn't really let you customize the UI, and it's basically a full screen DialogFragment so putting something above or below (or even on top) doesn't seem to be an option.

My calendar currently looks like this:

But I would like it to look like this design doc with a footer at the bottom. Let me know if you have any ideas, because I'm out of them. Thanks!

   val builder = MaterialDatePicker.Builder.dateRangePicker()
      .setTheme(R.style.ThemeOverlay_MaterialComponents_MaterialCalendar_Fullscreen)
      .setCalendarConstraints(
        CalendarConstraints.Builder()
          .setStart(Date().time)
          .setEnd(oneYearFrom().time)
          .setValidator(AvailabilityValidator(it.unavailableDays)).build()
      )
    builder.setInputMode(MaterialDatePicker.INPUT_MODE_CALENDAR)
    builder.build().show(requireActivity().supportFragmentManager, TAG_DATE_RANGE_PICKER)

from Is it possible to add a footer to the MaterialDateRange Picker?