Unable to verify my subdomain linked with zoho desk to google search console.

Unable to verify my subdomain linked with zoho desk to google search console.

My subdomain support.foyr.com is pointing to zoho desk.


I wanted to verify my subdomain on google search console. Steps below.
https://support.google.com/webmasters/answer/9008080#google_analytics_verification

As my subdomain is a CNAME record pointing to zoho desk I cannot verify it using TXT verification method. 

Alternatively, I tried with URL verification but these require addition of a meta tag
<meta name="google-site-verification" content="your verification string">

I have tried to do this but zoho desk does not seem to have support for adding a custom meta tag to perform this verification. The meta tags that are supported are title, description and keyword only. I need to be able to add this custom meta tag to see my data on google search console. How can I achieve this?