What speed will the speed test show?

Question

network hardware

The system administrator studied the direction of WiFi mesh networks and organized such a network on his desktop.
Since the network was built from available equipment, the WiFi channel speed between the routers was only 150 Mbps.
You can test the network capabilities and connect two laptops as shown in the picture.

On one iperf3 in server mode, and from another laptop throughput testing.
What speed did the test show?
There is also a second version of this question:
At the provider, the boss sent an engineer to restore the full functionality of the site, consisting of a chain of WiFi repeaters operating at the same frequency.
The engineer found out that the traffic through the site does not go at all, and two neighboring intermediate repeaters are frozen.
After rebooting one of the repeaters, the connection was restored.
It turned out that the designer had provided for a double distance margin, which, in the event of a failure of one node, would allow it to operate at half the maximum channel speed. After I rebooted the last hung repeater, the connection was restored at the maximum channel speed of 300 Mbps.

On one iperf3 in server mode, and from another laptop throughput testing.
What speed did the test show?