Most influencers doing cross posting, also have the same content on FB, IG, Twitter or with a little twist on IG, only reels and videos and visuals.
Doing every day 2-3 posts with different content to each of those social media platforms is a hell slow work process.
Please not use a wordpress plugin that shares your post automatically to these social media, why?
Big G has making canonical links useless. So you have a wp plugin that shares automatically your post before it's indexed in google(!) to these social media, what you think will happen in terms of seo ? Yep, google sees the social media platform as original creator not you.
So posting every day on your website and create another 2-3 posts (who are not on your wp site) for your social sites.
It's the same with medium import your wp posts, medium ranks with your content on google, not you, because medium gets your post indexed within minutes - you not.
Happy Sunday