Accidentally wound up with Ilford Delta ISO 3200 film. Can I use it, or should I return it?

I have recently started getting into film photography and I'm still learning the ropes. After buying a variety of color and black and white films to experiment with, I noticed that I somehow accidentally bought a couple of rolls of very high speed Ilford Delta ISO 3200 film. At this point, all I have is a Kodak Ektar H35N and an Olympus Pen-EES 2 which has a max ISO of 400. Is the Ilford film useless to me, or can it be used at lower speeds in certain conditions?

EDIT: This is tangential, but I was originally going to ask this question on Reddit instead of Lemmy because the conventional wisdom is that Lemmy isn't useful yet for more niche topics, but I thought "why not try Lemmy first anyway," and I'm glad I did. I found the most active film photography community on Lemmyverse.net (which hadn't yet even federated to my small instance) and it paid off. How nice!