Naiba has encountered several friends usingSiteGround servers for foreign trade independent websiteswho, after installation, found no buttons to install plugins and themes. Screenshot as follows:
This issue occurs because you selectedMultisite mode, i.e., you checked Install WordPress Multisite during installation, so it defaults to multisite mode.
Multisite mode is not conducive to the maintenance of a single site, so if you don't have a multisite website, it is recommended not to enable multisite mode.
The solution is to delete the currently installed multisite website, reinstall it, and do not check "Install WordPress Multisite".