Check original source code and layouts on the main website and subdomain. Partially working template can't be better then full working if you want the best template.
Log in here to create Instant View templates. Please enter your phone number in the international format and we will send a confirmation message to your account via Telegram.
This subdomain has a valid accepted issue. Please be consistent.
https://instantview.telegram.org/contest/telegraf.rs/template8/issue1/
"Subdomains that present content in a similar way to the higher level domain must be supported."
https://instantview.telegram.org/checklist#6-5-1-subdomains
Rules are clear.
Check original source code and layouts on the main website and subdomain.
Partially working template can't be better then full working if you want the best template.