container code

where can I find the container code for this
this is the only one, that does not seem to follow may new width
(including the new ticket form)

osTicket Version v1.14.3 (f4f5bc6) — Up to date
Web Server Software Apache
MySQL Version 10.2.33
PHP Version 7.4.9

Use DevTool.
For example in Chrome: hit F12 then CTRL+SHIFT+C and select an element which you want