To anyone interested in contributing, sbbs has totally transitioned over to fossil. The ticket list has all the issues listed https://fossil.textboard.org/sbbs/rptview?rn=1, and the wiki has a home, a usage and contribution page. As far as I see, anyone can contribute to the ticket list, so if there any bugs or feature requests, feel free to do so.
The only thing remaining is updating the link on the preference page.