To me, the surface appears to be approximately four years old. And add approximately 30% of the pool is covered with dust and organic matter making it difficult to fully see the surface. On top of that the clarity is down to 30% making it even harder to see the deep end. But what can be seen appears to be a relatively new Plaster job with minimal signs of issue, considering the visual conditions

The pool, located on a slight hillside, shows settling and structural cracks in the raised wall and concrete border, with decorative overlays over masonry exhibiting noticeable movement. The faux concrete wall and waterline tile will likely need complete replacement within 1 to 96 months. Missing mortar sections between the faux concrete waterline tiles, especially around the skimmer and across the pool, indicate a need for regrouting and re-adhering loose or missing tiles to ensure waterproofing. The current tile is prone to water penetration and temperature fluctuation damage, making standard ceramic tile a better choice, though this may be deferred until replastering. Regrouting and re-adhering costs are estimated at $5,000 to $10,000, likely closer to $10,000 due to the extensive lineal footage and issues observed. Total cost for this section is $5,000 to $10,000.

The water quality in the pool is poor clarity is poor, I would recommend doing treatments ASAP to help reduce the amount of black algae that is present, but I feel treatments ($375+) are going to be insufficient versus potentially draining acid washing and refilling ($1500+) instead. As treatments will likely only mask the algae up to 99% or an Acid Wash will effectively treat it the most aggressively at killing all organics.

There are three main drain covers two on the wall, likely for the waterfall pump and one in the main drain of the pool, if these covers are older than five years recommend updating your safety ($100x2 + $150).

Recommend updating the weir, float, float o ring, weighted basket, lid (west skimmer) and basket, float, float o ring, life (east basket) = $500+

The bottom cleaner is slightly older. Some of the rubber on the hoses connections are the laminating. It would be wise to recommend new hoses and likely a new tail soon not immediately likely in the next six months or less, but immediately a tail sponge and a new bag.

Manual fill only.

Recommend updated lights x2 as water is present inside the light lens (condensation).

Pentair LED color 120v = 1100-1400 x 2

+ install ($600).

The pressure is very high slowing 50 to 95% of flow, I would estimate that the filter is due to be backwashed ($10), and likely due to its age which I feel is under five years does not need it replaced, which is typical after 7 to 15 years ($500+).

This pump does turn on and operate, it is older, it is fairly worn, but functional. Maybe be wise to consider removing the pump and using the filter pump to do both functions, for energy efficiency.

There is a lot going on out here, but one thing I do not see is a GFCI for the pool pump pool light - recommend adding for safety ($350+)

There are several leaks and old valves that are of general, poor quality. It would be wise to just do a complete update so this can be good for 30 to 50 additional years without any service. Estimated cost for six valves +3 filter unions and Plumbing installed $2500.