I noticed that and linked the issue id in my post.
My T-Beams are a bit diffrent as they use an ublox M8N GPS Chip (at least they are labeled as M8N).
With a plain serial monitor i observed not ZDA messages only GGA messages from the module.
With u-center i managed to enable the output of ZDA Data on UART1.
Furthermore the gpsread.cpp needed to be edited to GNZDA insted of GPZDA
TinyGPSPlus gps;
TinyGPSCustom gpstime(gps, “GNZDA”, 1); // field 1 = UTC time (hhmmss.ss)
TinyGPSCustom gpsday(gps, “GNZDA”, 2); // field 2 = day (01…31)
TinyGPSCustom gpsmonth(gps, “GNZDA”, 3); // field 3 = month (01…12)
TinyGPSCustom gpsyear(gps, “GNZDA”, 4); // field 4 = year (4-digit)
But propably this output is also dependeant of the GPS module NMEA sentence configuration.
I will verify this with some other T-Beams and open an issue on Github