Diversifying into consumer tech isn't really Nokia's area of strength - they tried getting into digital health with the Withings acquisition which they then did nothing with and ultimately sold back to the founders taking a massive bath in the process.
See also Ozo, the £50k 360 degree camera which they spent a fortune on and then shuttered. https://www.wired.co.uk/article/nokia-ozo-360-vr-camera-release-date-price
Neither of these types of market are big enough to save them anyway - they need to make 5G a success.