A different job, someone else’s screw-ups:
Comments:
1. You attach the cistern to the pan before setting it down, there’s no excuse for not shimming it to finish with a 5mm wall gap (max) to white silicone fill, and building up the base with white cement, white sand mortar. You could even rake this out slightly and come back to glaze the mortar with a layer of white silicone.
2. The inlet has been set so low in the cutout that the float (inlet) valve can’t be adjusted any further up, or removed for service without unscrewing the cistern stop.
Both these issues as presented, are unprofessional, the second is - to my perspective - dishonest, as it is not really in a practically serviceable state. I feel for people who get told “that’s how it is” and pay up.