Based on the linked forum discussion, they do have native builds:

> We currently have a private beta for experimental arm64 linux support (no 32bit). If you have a valid Sublime Text 3 license and are willing and able to test on your arm64 device....

Also, if the site did have a mistake, you could just open a pull request, which is why I prefer this site over isapplesiliconready

I did: https://github.com/ThatGuySam/doesitarm/issues/279

For Linux.