Do I Need to Add My Subdomains to Google Search Console?
efix.’ When you choose to add a domain, it‘ll add both HTTP and HTTPS variants for that domain and their subdomains. While you’ll need DNS verification for this, it’ll provide you with aggregated data that will be easier to monitor. We do recommend adding both a domain and URL prefix to GSC as best practice. While domain property allows you to see everything from a high level, URL prefix allows you to submit disavows and other tasks.
Alternatively, if you want to keep your data separate, you can enter each of your domains and subdomains separately.