I do use DSD and that's how I got the neighbor list. But, I didn't get that info in the event log. It only had the one freq that I was parked on and had a question mark in place of the LCN. I'm not sure the other sites are even turned on.
In the bigger scheme of things I'm really not that invested in finding the rest of the system until it starts being used regularly.
Being used more regularly may come sooner than you think. Connect Plus has been EOL for years. Large wide area Con+ systems all over the US are currently transitioning form Con+ to T3. There are threads all over RR about it. In your original post from April you found one site online that listed 6 neighbors -- with most if not all of them likely to be online to some extent with one or two freqs. Fast forward seven months and now somebody has reported another site online with four neighbors (at least three of which are likely online). I suspect the buildout is much further along than you suspect.