I see a lot of questions regarding real aircraft, but I have a question about my drone. Is it appropriate to ask questions about drones and UAVs on the website?
There is a tag for it -- https://aviation.stackexchange.com/questions/tagged/unmanned-aerial-vehicle -- so I would think so. You won't find the site to be a good resource for practical help though. If you have very specific definable questions about aviation regulations this site might be of some use to you though most folks probably aren't familiar with regulations as they pertain to drones.
Anyway I think the basic answer to your question is "yes", but the results might not be what you are hoping for.
Keep in mind too that the site guidelines forbid asking questions about where to procure specific items. ("Where can I buy a size 5 battery for my xyz drone....)
For theoretical questions or questions about how to calculate something, you might get some good results here, but you might also consider the "modelling science" subforum of rc groups dot com; there are some pretty smart people who post there or at least there used to be. Depending on whether it's a multicopter or fixed-wing there might be some other appropriate subforums on the site as well. Plus a traditional forum like that is more suitable for an extended conversation; this site definitely isn't.
But welcome to the site if you do decide to post your question(s) here.
While they're not off-topic here (they are still aircraft after all), there is now a site solely for UAVs/drones, which might be a better fit for some questions