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I couldn't find any reference to it in this document, maybe it was made for the older firmware.
The AT versions are also old in the document: such as, v1.2.0.0, v1.1.3.0, v1.1.2.0.
The good news is that there is a reference to TLS 1.3 on the Adafruit site:
https://blog.adafruit.com/2022/12/13/esp32-esp8266-https-and-ssl-tls-encryption-basic-concepts-esp32/
Geza
I really don't know - you'd have to check the ESP8266 docs on https://espressif-docs.readthedocs-hosted.com/projects/esp-at/en/release-v2.2.0.0_esp8266/AT_Command_Set/TCP-IP_AT_Commands.html#cmd-start