After deploying the fields and after adding those fields to the page layout, sometimes it will not be available to the users. This is mainly due to Field Level Security.

So, after deploying the fields, we have to deploy the profiles or else we have to set the Field Accessibility.

To check the field accessibility, kindly use the below link

https://infallibletechie.com/2013/02/field-accessibility-in-salesforce.html