Once you’ve converted your Facebook Page account to Business Manager, you may find sharing from your personal timeline to your Page is an issue.
Try this:
- Find a post you want to share and click Share, then Share… for more options.
- Choose Share to a Page you manage:
- Add a comment, and choose you you’re posting as and even Tag someone if you like:
Voila! You’ve just re-posted from your timeline to your business page.