Does the ARDUINOMKR CONNECTOR CARRIER not work at 3.3V?

The ARDUINO MKR WAN 1310 page says Board Power Supply (USB/VIN) 5V.
"MKR CONNECTOR CARRIER only supports 5V."

It is written on the Tech SPECS and FAQ tabs on the reference page.
By the way, MKR CONNECTOR CARRIER needs 7V-16V.
Note:Other battery descriptions in Tech SPECS and DOCUMENTATION still appear to be 3.7V.

ARDUINO MKR WAN 1310

• TECH SPECS
  • Board Power Supply (USB/VIN) 5V
  • Supported Batteries rechargeable Li-Ion, or Li-Po, 1024mAh minimum capacity
• DOCUMENTATION
  Li-Po 3.7V (Battery)
in the Pinout Diagram
• FAQ
  Batteries, Pins and board LEDs
  Vin: This pin can be used to power the board with a regulated 5V source. If the power is fed through this pin, the USB power source is disconnected. This is the only way you can supply 5v (range is 5V to maximum 6V) to the board not using USB. This pin is INPUT. Vin: This pin can be used to power the board with a stable 5V source. If power is coming from this pin, the USB power is disconnected. This is the only way to supply 5v (range is 5V to maximum 6V) to boards that do not use USB. This pin is input.

• Board Power Supply (USB/VIN) 5V
• Supported Batteries rechargeable Li-Ion, or Li-Po, 1024mAh minimum capacity

ARDUINOMKR CONNECTOR CARRIER (GROVE COMPATIBLE)

• TECH SPECS
  input Voltage (screw terminal block) 7V-16V (Buck Datasheet)

This must be the voltage of the user.

Grove-CO2 & Temperature & Humidity Sensor (SCD30)

• Specification
  Supply voltage 3.3V/5V