Automatic generation of subdomains and pages in WordPress from the database - how to implement?

Question

WordPress

Good afternoon!
The situation is the following.
There is a site on WP https://ve-zy.ru/, we want to display 112 subdomains, but it does not automatically allow this. It only allows you to display the third level of nesting by URL for these subdomains, while automatically redirecting from the main page of the subdomain to the main page of the main site.
In addition, hundreds of pages will be automatically generated on each subdomain in the direction of St. Petersburg-Moscow, St. Petersburg-EKB, St. Petersburg-Krasnodar, etc. (infa for generation will be taken from the exel table and calculated via php). The design of the page is different - it was created separately from the main template, which made the site.
Question: Is it possible to make subdomain master pages auto-generate with the new page template design?
Tell me, please, has anyone encountered a similar situation?