The bit-banged RTC is available to the system and can be used to set the system clock at boot by adding a line to /boot/config.txt.
If there is internet time available, the Pi will update the RTC.?
I let the RTC set the system time and modified sBitx to just use the system time and not do anything with the RTC. I also installed and configured chrony to set the time from a USB GPS dongle, if available. My sBitx will automatically work with three time sources (4 if you count fake_hwclock) and set the system time from the best one available. By using the system time, the same time is available to all programs.
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73,
Mark, N8ME
Mark Erbaugh