First pic is unlikely to be the VM connection.
At the bottom of the first pic is a cable clipped to the skirting board. What is that and where does it go?
The splitter in the second pic looks like VM but the feed in would connect to the empty single socket on the splitter in the foreground of the pic.
Sometimes there is no VM socket, only a trailing cable with a plug on the end.
A default cut/paste reply with some example pic's is ....
Sometimes there is no wall box, just a trailing cable. The cable could be hidden within, or behind, furniture. Occasionally only a very short stub of wire is left behind often hidden within a blanked-off fitting. A few examples of the kind of things to look for are in the images below from past topics.
https://community.virginmedia.com/t5/QuickStart-set-up-and/Untidy-installation/m-p/5433266#M239199
https://community.virginmedia.com/t5/QuickStart-set-up-and/Reconfigure-my-setup/m-p/5434572#M239308
https://community.virginmedia.com/t5/QuickStart-set-up-and/Diamond-cable-wall-socket/m-p/5430136#M238904
https://community.virginmedia.com/t5/QuickStart-set-up-and/First-installation-and-flashing-green-light/m-p/5434785#M239339
https://community.virginmedia.com/t5/QuickStart-set-up-and/No-virgin-media-wall-socket/m-p/5395697#M235740
A wall box may be branded with the logos of an old cable TV company (not VM). Past occupiers of your property may have removed the cable and sometimes they are removed by other installers, such as satellite TV techs.
If you have a cable/plug trailing from the wall, you may need a coupler adapter to join two plugs together
https://www.diy.com/departments/slx-coaxial-connector-19mm/5028422001905_BQ.prd
Also available from the likes of Screwfix, Toolstation etc.
If you have a plastic omnibox outside on the wall (where the VM cable comes in from the street) see if you can trace any wires from that into your home. The wall box will look something like these
https://www.ispreview.co.uk/wp-content/gallery/2019-article-illustrations/virgin_media_external_wall_box.jpg
(styles and colours may vary and branding may be non-VM (such as former cable TV companies).
If no luck, call the pre-installation and delivery team on 0800 052 1734 explain the problem and request a tech visit to install a socket.