Share your experience!
First thing to check
settings > apps > all > scroll to the bottom > see if they are there > enable
do you have the chinese variant ?
two possible reasons
1. you rooted the phone and uninstall them
or
2. you have the chinese variant
to solve 1. repair the phone with PCC
Bridge (for Mac)
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
to solve 2. flash the phone with flashtool
/t5/Xperia-Z2/How-to-manually-update-downgrade-root-2014-Xperias/td-p/593459