Quick links for calculating range of a given transmitter based on data rate, distance, frequency, antenna, etc.
https://en.wikipedia.org/wiki/Free-space_path_loss : Explains losses associated w/ radio waves travelling in free space (i.e. losses from radio waves travelling between antennas), based on frequency & distance
https://electronics.stackexchange.com/questions/83052/how-to-know-or-estimate-the-range-of-a-transceiver : Some explanation about Free-space path loss, also briefly touches on power requirement of receiver based on data rate, need to research this more though as it isn’t very clear
https://www.immersionrc.com/rf-calculators/ : Calculator that’s useful for figuring out parameters and range of an RF RX/TX system