how to add memcached to php 8.2.24

I have
Plesk Obsidian Web Admin Edition 18.0.65 Update #1
running on Debian 12
and a working memcached running on the machine
however, I can't seem to get to add the php extension.

/opt/plesk/php/ only lists a director 7.4 which is probably not the php 8.2.24 that runs on the webspaces.
can anyone point me to the correct way to integrate memcachede extension into the 8.2.24 by OS Vendor run as FPM Application

thank you