The maximum voltage of the charger should be around 4.20v. Check with a multimeter.
Unfortunately this is not a solution but work around, which I have tried already and it is not reliable, furthermore it is not a subject of my question. iNA is a voltage and current sensor.
And my wiring is correct, which I have found here:
And it works properly.
And as per ESP32 - the voltage the board uses is up to 3.6V:
„ The ESP32 Board’s operating voltage is between 2.2V to 3.6V . But we can supply 5V from the Micro-USB port. For applying 3.3V there is already an LDO voltage regulator on the module to keep the voltage steady at 3.3V. ESP32 can be powered using Micro USB port and VIN pin (from external supply).”
So your post is misleading. And additionally it is offensive.
And I repeat, “…but esp32 converts the power in voltage to 3.3V” makes no sense at all.
But, I ordered some INA219 breakout boards for a project based on your input. On re-reading the specs it does report the bus voltage.
I would still quote the ESP description as per the voltage but you can easily re-read the prev. post or just grab some independent sources.
Enjoy INA, it consumes around 0.02A so for my use case it suit the purpose. And it is asy to install even if you have another I2C sensor like I have.
Here you have to separate two things, operating voltage and VIN voltage.
VIN voltage has to be higher than nominal output voltage of LDO (here 3.3V)+Vdif to make it operate reliably. For some of the best LDOs it’s 3.4 - 3.5V depending on current draw. For crappy 1117 clone_of_the_clone regulators it’s around 4.5V
For the operating voltage (3.3V pin) Espressif states 2.3 - 3.6V. But for the chips that have internal flash or PSRAM the minimum is 3.0V.
INA219 has minimum voltage 3.0V
Have you provided for discharge protection for your 18650?
I can not agree more. 
have a great Sunday. Best. J