Opengraph image different from Avatar?

Hi,

is there a way to configure per account a different opengraph image than the avatar image?

Reason I am asking is, when I am sharing single posts (no urls to articles) on other networks I would love to use a different standard image, where e.g. I can advertise the #fediverse in words and logo.

So sharing would meet 3 situations

Sharing a post with my profile URL = my avatar
Sharing a post - no URL provided = my fediverse logo / fallback (if not defined) my avatar
Sharing a post with an article url = the article opengraph image

What do you think? And would it be possible?