Google Auth Export

Install qrscan using Scoop

//Install QR Scanner
scoop bucket add extras
scoop install qrscan

On Terminal, use qrscan --preview to scan the export QR code

Copy the entire output to a text file, eg export.txt

Download TOTP Secret extract tool from Github page

Install Python first

// Install dependencies required for extrating TOTP secrets
pip install protobuf
pip install qrcode[pil]

cd to extracted folder after downloading from Github

Use python .\extract_otp_secret_keys.py -p .\export.txt to extract secrets