"According to DataDome". A company who sells that as a service.
More likely, they just don't have any obvious protections that DataDome's lazy engineers could identify. They probably just checked IP ranges to see if the services were proxied by DataDome, Cloudflare, or another such service.
I don't trust anything DataDome says, because they are a known shitty service. They will arbitrarily block users, intercepting their requests to show a captcha page. Then, after the user correctly solves the captcha, they are directed to a page which reads simply "You have been blocked." There is a fake contact form at the bottom of the page, which submits appeals into a black hole.
Here's an example of the block page. This user is connecting from a proxy, so the block is expected, but DataDome is known to block residential IP addresses arbitrarily.