Scope statement detail

Answer:
First, you can go to an internet search engine and look for "environmental management system certificate textile" or “environmental management system certificate knit garments" to see several real life examples of environmental management systems’ certificates stating their scope.
You can see that some are very general "manufacturing of garments" and others are very detailed.
Second, your proposal goes into the more detailed field and I believe there is no problem with that.
By the way if your organization has more than one location, some certification bodies require to identify the applicable location in the scope statement.

The following material will provide you more information about scope:
Article - How to determine the scope of the EMS according to ISO 14001:2015 - https://advisera.com/14001academy/blog/2016/02/01/how-to-determine-the-scope-of-the-ems-according-to-iso-140012015/
Enroll for free in this course – ISO 14001:2015 Foundations Course - https://advisera.com/training/iso-14001-internal-auditor-course/
Book – The ISO 14001:2015 Companion - https://advisera.com/books/the-iso-14001-2015-companion/