Hi,

You can show custom contact fields in CRM by using related fields.

In the crm.lead model, create a new field.

Use the same field type as the one you added in Contacts.

Set the field as:

related='partner_id.your_custom_field_name'

Then, add this field to the CRM form view using xpath.

This way, your sales team will see contact info directly in Opportunities.

Hope it helps