We're upgrading from Moodle 3.3.2 to Moodle 3.8.2+.  We've started with our testing environment via upgrading from from Moodle 3.3.2 to Moodle 3.6.2. and, after verifying the system, to Moodle 3.8.2.+

Having all the tasks finished and the system working, we've realised that in 3.8.2. the option "install plug-ins"  doesn't appear.  I attach document with screenshot of 3.8.2 and 3.3.2.

May you help me to identify the problem?

Thanks in advance.