Remember that Humidity Affects Temperature Split

Here is my pull quote from an article posted at HVACRschool.com

Keep in mind, when you are doing a new system start-up, high humidity will cause your air temperature split to be on the low side.

Evaporator Air Temperature Split (Delta T)

The evaporator air temperature split (Delta T) is a nice calculation because it gives you a good look at system performance and airflow. The air temperature split during typical conditions will be between 16 and 22 degrees difference from the return to the supply. Keep in mind, when you are doing a new system start-up, high humidity will cause your air temperature split to be on the low side. Refer to the air temperature split and comfort considerations sheets for further information.

https://hvacrschool.com/the-5-pillars-of-residential-ac-refrigerant-circuit-diagnosis/