I am triying to implement strapi for mult-teancy env ,but its not supporting to do ,i have 10 tenants i need to maintain all in one 1 app how can we do that

If all of them will have access to the same content… yes. Strapi is headless CMS, so you just need to point the tenants to that Strapi app through Nginx or whatever webserver you are using.

But, there is no way to separate their users or admins if any. Also, in case of user registrations you can use only one email address that is sending confirmations.