We are using module version 1.3.4 on M2.4.2 but we are facing an issue.
If we enable your Bss Customer Attribute extension it creates an issue with our Order Attribute extensions from Amasty.
In the Admin order page, it doesn't show the additional attributes of the order but if we disable your extension it works.
The root of the issue is from the conflict between our module with the 3rd-party module Amasty Order Attributes on the site.
The module Customer Attributes overwrites the order_infor block in the file /Bss/CustomerAttributes/view/adminhtml/layout/sales_order_view.xml so the Amasty module cannot add the block.
To solve this conflict, we have created three files as below
Please apply these files on the site to solve the issue.
If you have any issues, please feel free to contact us.
We'd like to help.