TCP Category Subdomains plugin can converts post and WooCommerce product categories to sub-domains.
Simply Create a Posts or Product Categories. All post and product categories will be included inside the plugin page. You can choose to enable or disable them.
You may require configuration of adding wildcard subdomain. Normally it will be configured by host, ask them if needed but most of the host already did it. It will increase the performance of site and will help in SEO. Plugin will also auto redirect to new subdomain link to avoid duplicate content issue.
[FREE] Maximum 5 post or product subdomains
[PREMIUM] Unlimited subdomains for all post and product categories
IMPORTANT
Do not forget to setup a WildCard Subdomain.