I learn something everyday, thank you for the information :)
I'm very new to drone, bought my first a few days ago DJI Spark, waiting for the remote to come, I'm disappointed when I read yesterday that even with the remote control you will reach a maximum of 500 meters in distance with 2.4 GHz because of CE and the height is even worse 100 meters max.
I just read how to enable DEV mode in DJI Assistant 2, do not know if this is for other drones but it did not help for Spark. I could change restrictions such as height and distance. Every time I read settings, it's correct it has been saved. However, in the iOS app, it's standalone height of 100 meters limit. Also tested and fly today 100 meters max.