Is it possible to add to header script from content-single.php?

I want to custom code my jsdon-ld on the fly inside of my content-single.php file. Is this possible or is the header already generated?

See, in my content-single.php page, I do a TON of heavy lifting with PHP on some ACF data fields in my posts-meta table. So I don't have the data I need for the jsdon-ld until I run the code inside my content-single.php.

Is there a simple way to do make this work?

Also, I might add that Google doesn't require schema in a <script> tag to appear in the header, it can appear in the body. But I was just curious if there is a way to get it in the header at the point in time that content-single.php is executing.