Magento 2 customer attributes helps to create an unlimited number of attributes with ease and then effectively manage them without the need of a developer.
A smart way to add extra attribute fields and gather as much valuable customer data.

Highlight features:

- Create and customize unlimited customer attributes/ customer address attributes
- Manage customer attributes systematically and effectively
- 2-side editing: customer and admin
- Allow different input validation for each attribute
- Compatible with one-step checkout extension

Link product: https://landofcoder.com/magento-2-customer-attributes.html/