Webhook related load testing?

I was curious if anyone has done or looked into webhook load testing, where you’re testing the service that’s sending webhook events out to a server that’s receiving the webhook notifications, and testing that at scale. Note that in this scenario, the focus is the service emitting webhook events, and not so much on the receiver side (like how many webhook events it can sink/receive, hypothetically assuming it can take whatever you got), so the focus is how much you can POST/send out.

I’ve only found this article online that somewhat relates to the subject: https://www.testdevlab.com/blog/2017/11/how-to-load-test-webhook-services/.