Custom fields transfered in following phases

Custom fields transfered in following phases

Hi Zoho,
a customer of us asked WHY the custom fields we created for them, can't be transfered in following phases.

Example:
In Estimate we fill these custome fields, then we create the Sales Order and then again the Invoice. B ut those custom fields there are not!
It would be a great idea is this can happens, such as Tems and Conditions.

Do you think can be something that your team can create?