Reddit has been a kind of unofficial support channel for a lot of companies since it doubles as good pr to be visibly helping their community. For smaller companies it's also a lot easier to spin up a subreddit and try to attract people there for a free marketing and support platform. I see quite a few tech companies operate in that way, but Ubiquiti is one of the bigger ones that first comes to mind.

With the rise of Discord, I think Reddit is losing some ground in that space much like individual forums before it, but Reddit still has a lot of historical data in it for troubleshooting things that aren't as common.