Yeah Newegg does not even list Socket TR4 coolers yet.
Right now we are limited to coolers that fit the bracket included with TR itself. And of the ones listed on AMDs page should work, except for ones not released yet.
https://www.amd.com/en/thermal-solutions-threadripper

You will find some on the list not available atm.

This is why I went with the Thermaltake Water 3 Ultimate, it fit the included bracket perfect.