The website that I’m working on (https://thuisuitjehuis.nl/) does not show a social media preview on facebook or Slack. It does on WhatsApp though ¯_(ツ)_/¯
Also, URL inspection on the google search console returns an error about a redirection issue.
I think the FB Debugger helped - when I first input your URL into this, it did not show an image. After pressing “scrape again”, it detected the image.
This is most likely caused due to your dns provider having root restrictions.
Try chaning the default version to www in the project settings under “Hosting”