In 2021, which publishers distribute novellas?
The Hugo awards are prominent fan awards in the SF&F genre. In 2021, I noticed that all of the finalists in the Novella category are from a single publisher, Tor.com. Novellas have, I understand, historically been harder to market than either novels or short stories, though I don't know if that's changed as e-books have become more prominent. Tor actively promotes its content online, and I see a novella that they gave away for free last year among the nominees.
Thinking back on my own reading over the last year, all of the novellas I've read came from either Tor or independent publishers who probably don't have Tor's reach. I don't know if this is because I'm not noticing other publishers or because that's pretty much the current distribution (at least within SF&F).
In 2021, who is publishing novellas? What does the distribution look like? If I wanted to get my novella out there, is Tor the de facto single publisher, or are there other viable options that just didn't happen to make the Hugo ballot this year? Is there data, grouped by publisher, on the distribution of recent novellas?
(Assume that my goal is to have people read my work, not to maximize income.)