Are bioinformatics questions on-topic on this forum?
Or is there a .stackexchange forum more dedicated to bioinformatics?
I don't see a Stack Exchange site currently dedicated to bioinformatics. Bioinformatics should be on-topic here, since it is computational, and it shares some methods with statistics and machine learning. I think as long as the questions are more about computatjional methods and less about biology, it could work well. A challenge we face as an interdisciplinary community is getting enough experts to contribute both questions and answers when new topics come up. Computational chemistry is on-topic, for instance, but most of those questions have migrated to Chemistry Stack Exchange; you might try looking at Biology Stack Exchange to see if they have a community of bioinformaticians.