How to establish 3 connections simultaneously between 1 mobile phone and 1 nRF52833 device ?

Hi,everyone:

We are developing a Nearby protocol combined with UWB, which needs to communicate with the Bluetooth of Apple phones 
and then use UWB to measure distance. We are currently encountering a problem. In the background, the ranging frequency
is only about 2hz. If we establish one more connection, we can increase the frequency of 2hz.

Therefore, we hope that one nRF52833 and one iPhone can establish multiple connections to increase the frequency of UWB ranging.
How can we make one 52833 and one mobile phone establish multiple connections at the same time?
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