It looks like Google Maps is using old imagery for some reason. If you look on Google Earth, the image used appears to be from 12 Jan 2016[1]. The more recent imagery (2022 onwards) shows the new build, and you can see glimpses of it in Street View on Google Maps.

[1] https://earth.google.com/web/search/%22Robin+Masters+Estate%...

I guess there is less post-processing of images in Google Earth, because it is more professional-oriented product.

E.g. the same place in 2020,2021 is covered with a cloud, which never happens in a consumer-oriented maps.