social sharing icon not displaying as it should

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Hello all, so i have spent a few hours on this and now i give up !   The settings for my home page social share icon are as follows:

Screen Shot 2020-11-07 at 10.52.56 pm.png

how ever when i share on social media, this is what happens:

Screen Shot 2020-11-07 at 10.54.45 pm.png

not even the meta description is showing, and i was so careful to create an image for the social sharing icon to the exact specified dimensions.

what am i doing wrong here ?

thanks very much