Could I export server template and import to another server ?

I setup virtualmin on local machine with different server template configured.

Could I export those server template and import to a production server ?

I went thru all the configure pages of virtualmin but nothing found at all.

I have a little doubt that you really went through all configuration pages, at least not thoroughly :stuck_out_tongue:

Server templates can be included in Virtualmin Backups, under Features and settings -> Virtualmin settings to also backup.

Another hint: There is a Search function in Virtualmin, which can often point you to the right function.