Sony Xperia 1 iii fingerprint sensor no longer in settings

[mandipbassi]

I've had my Xperia 1iii for just over 3 years and over a year ago the fingerprint sensor stopped working and then disappeared altogether from settings. I've just done 2 factory restores for another issue and I hoped this would fix it but it is still missing. If anybody has a solution for this I would be very grateful to hear it. Thanks