Added field in lead form, which shows in "Create" view, but not when saved in "Lead" view

Please see screenshots:

Create screen
https://imgur.com/MeDNn1U

Actual Lead screen
https://imgur.com/Jr7t8TE

The first is called the “Edit view”

The second is called the “Detail view”

So you need to go back in Studio and the field into the module’s Detail view, and then Save and Deploy.