Using Javascript or GTM for Structured Data is not a bad thing

Get Rating Rich Results for Local Business with Third Party Reviews

Schema.org for Variable Products with ProductModels, Offers

Additive Schema.org Data for Local Inventory Advertising

How to Remove Shopify Theme Schema.org Microdata

Schema.org Open Linked Data

Supporting Schema v3 and Extensions

Required Schema.org Fields

Multiple Schema.org Instances on One Page

Managing Client Acconts