got this from someone in a private group. I haven't had the time to check but she also sent some links on what all social media settings should be. Her post;

Hey, Facebook changed the dimensions of the image header sizes yesterday so if you run a group or a page, your header is probably a little off now. Here's a link to get the new size:
And here's a cool spreadsheet guide I found a while ago and reference often. (Ironically, it hasn't been updated yet, but I'm sure they will soon).…/social-media-image-sizes-guide