Common trade practice regarding conduit has been that 'laborers' are allowed to install it. Duct banks for data/comm around here, are all 'laborer' installs. As far as I am aware, our POCO uses 'laborers' also. Keep in mind that these 'laborers' are union.
The cable/wire is 'sparkies' or CWA guys.
An old tale around here is 'once upon a time, the electricians were 'to busy' to want the UG pipe work'. Lately, the 'story' ahs changed, due to guys being 'not busy'; but it's too late.
Landscape guys do all of the sprinkler work here. Generally, as long as it is the typical 24vac, the AHJ does not get too concerned. They just want to be sure the controller plugs into a compliant 120v GFCI receptacle (in use cover etc) The sprinkler valve wires usually get run with the pipe.
I was unable to determine what type of system it was and will go back this week and check. It probably was not a service lateral. I called out the rule in my clip because I was more concerned with the lack of "qualified persons" who were not licensed here doing the work! I was not even sure as to the voltage, goes to show you, that when you are an old man that you have to be careful.
FPL uses "contractors" (2 guys and a mini Kabota) to put in underground service laterals. The real electricians come in later to make the connections. Your pictures look pretty normal to me. Back in the happy days when things were busy most ECs also contracted out the digging. These days they do the work themselves, much to the dismay of guys who hate digging.