For WioE5 modules, can the transmission speed be calculated?

Hello community,

I have been working with the LoRa WioE5 modules, and I have a certain doubt, under the LoRawan protocol the reception windows RX1 and RX2 in total cover a minimum of 2 seconds of waiting time to receive the confirmation from the IoT server, but my doubt is if this time can be reduced? or by protocol and standards is it the minimum or does it depend more on the IoT server?, and if necessary, what is the average speed or approximate transmission time of the WioE5 modules, I am attentive to any information.

Thank you very much.