Custom notification

Good morning ..

This Plugin seems to make my case. I’m just looking for a ystem of notirica. but we come now to us.

I created a custom post type (private) called “contracts” with an advance custom field data Ext “maturity” associated with a untente registered with the site.
I created a small function that retrieves based on the date of the server “” expiring contracts. I would like to know if it is possbile to send a push notification to the individual user ID based on the data server.

in essence, you can crearea notifications are not just publishing posts?

I look forward to any feedback or suggestions, I state that I have not viewed the plug-in code, but before doing so I want to know if you can create notifications as needed.

https://wordpress.org/plugins/onesignal-free-web-push-notifications/