The phrase "to reach out to someone" means to attempt to establish communication or connection with another person, often in a time of need or crisis. Full definition
This is a convenient & effective means of reaching out to other people. (datingsitesinusa.com)
The affidavit says the bookstore owner also reached out to people who buy and sell rare books to alert them that the book had been stolen. (religion.blogs.cnn.com)
If you can not do either, then please reach out to see if there is any way you can volunteer. (dogcopilot.org)