It might be that it is 5 GHz. The ESP32 can only recognize access points on the 2.4 GHz band.
Is the Google Sheets integration essential for your project?
If you need to put the data in a spreadsheet, you could print the data to Serial in a CSV format. You could then manually copy and paste the data from Serial Monitor (though if you are using Arduino IDE 2.x this is not very easy to do) into into Google Sheets or any other spreadsheet program (e.g., Microsoft Excel, LibreOffice Calc). Or instead of Serial Monitor, you can use an external program to save the CSV data from the serial port to a file, which you can then import into Google Sheets or open in a local spreadsheet application.