How to change image in social meta plugin ?

Hello,
I had installed the Social Meta plugin on a Joomla 3.10 site. This created a tab within the article content that allowed me to change the Open Graph image. I just subscribed to the same plugin for Joomla 5, and this button is missing. The image is automatically the one from the introduction or the article, but it's too small for Facebook, for example. How can I easily change this image to another one? Hopefully, it won't change every time I save the site.