Is the throughput value related to the response time of requests in JMeter?

I'm getting the following results, where the throughput does not have a change, even when I increase the number of threads.

Scenario#1:

Number of threads: 10

Ramp-up period: 60

Throughput: 5.8/s

Avg: 4025

Scenario#2:

Number of threads: 20

Ramp-up period: 60

Throughput: 7.8/s

Avg: 5098

Scenario#3:

Number of threads: 40

Ramp-up period: 60

Throughput: 6.8/s

Avg: 4098

The my JMeter file consists of a single ThreadGroup that contains a single GET.

When I perform the request for an endpoit where the response time faster (less than 300 ms) I can achieve throughput greater than 50 requests per seconds.

Can you see the bottleneck of this?

Is there a relationship between response time and throughput?