Why is the image from my url on a linkedin post different from when I post on slack/imessages?

Publishing help SEO
1

why is the image from my URL on a LinkedIn post different from when I post on slack?
all my SEO settings are synced.

Screen Shot 2022-03-04 at 1.40.58 PM
Screen Shot 2022-03-04 at 1.40.58 PM1052×820 228 KB

Screen Shot 2022-03-04 at 1.41.17 PM
Screen Shot 2022-03-04 at 1.41.17 PM1096×786 116 KB

Here is my site Read-Only: LINK
(how to share your site Read-Only link)