Hello,
There is currently a know issue regarding Eve equipements.
On my tests, with a google nest pro wifi outer the eve devices are added without any struggle, but when using any other router it fails.
I don’t have updates following this dev.
I had also issues regarding the IPV6 not enabled on my network.
They tend to be very network restrictive if you have one device not supporting mDNS or multicast.
I have found a better way to add Eve devices without a smartphone through the HomeAssistant web UI by using this guide :