Publish the build, because the months in between are the fear
Finished pool photography is the most abundant and least persuasive content in this industry, and the construction sequence is almost entirely unpublished.
Buyers are not worried that the finished pool will look bad. They are worried about excavation in their yard, subcontractors coming and going, delays nobody explains, and the stories they have heard about projects that stalled.
A documented build answers that better than any assurance. Excavation, steel, plumbing, the shell going in, inspections, decking, tile, startup, with what each stage involves and roughly how long it takes.
It also sets expectations before somebody signs, which reduces the complaints during construction. A customer who has already seen what week three looks like is not alarmed by week three.
The unattractive images are the persuasive ones. A muddy yard with rebar in it, honestly labeled, does more for credibility than another twilight photograph, precisely because no competitor is willing to publish it.
One thorough documented project is usually enough. This is not a volume exercise, it is an existence proof that you know what happens and are willing to show it.