I installed iperf3 using "apk add iperf3", but it did not work.

Error on other linux (iperf3 -c 192.168.150.16): iperf3: the client has unexpectedly closed the connection

Error on iSH (iperf3 -s): iperf3: error - unable to set TCP_CONGESTION: Supplied congestion control algorithm not supported on this host