Hi jonesq,
According to “4.2 Recommended Power Supply Characteristics” in the datasheet, the recommended power supply voltage for the ESP32C6 is 3.0 to 3.6 V. If a 3.7V LiPo battery (4.2 V when fully charged) is connected to the 3V3 pin, the ESP32C6 will be damaged.
Also, connecting to the 3V3 pin will not charge the LiPo battery.