Just noting this here in case helpful for others about this relatively simple hiccup.
Total field was just not working. Even when I did troubleshooting recommended steps of Health Check and removing all other plugins except GravityForms and ALSO (supposedly) running only the 2020 basic theme template on site.
Nevertheless the “Defer jQuery script loading” setting in Themify was still active!
Under Themify settings | Performance |
Unchecked “Defer jQuery script loading” in Themify settings and all is well in GravityForms once again.