We’ve seen how your posts on social media need to have image content, but to get the most engagement the images need to be sized for the appropriate social media platform, otherwise you’ll get cropping which looks particularly bad (see example below).
There are appropriate image sizes which can be used which will show in people’s feeds without cropping. They are
1200 x 1200 pixels
1500 x 500.
I’d suggest re-sizing your images to each platform as appropriate (as in these examples).