Depends on which faction maybe? I rarely see people in Craglorn for DC anymore and if I do they are just farming nodes if you're actually trying to run content try asking guild mates or if you are in DC send me a message on here and I'll run through it with you
I recommend you wait until text chat is released on console. Too many people have area chat muted in craglorn. It took me countless hours of randomly inviting people and explaining that there is actually a quest series there.
Craglorn has been dead for long long time. I'd love to do it again someday, I think Zen could do almost mini-update and revisit Craglorn, why not just to revisit it again and sell it as DLC as better and improved version.
Honestly there are only 2 or 3 delves that can not be done solo. They just have mechanics that require multiple people to activate a switch or open a door. The delves say they are group delves but you can easily solo most of them, even in upper Craglorn. My Templar even solo'd 3 of them (lower craglorn) as a vet9 and he was pretty squishy at that time