How does it work, on the buyer side and the dealership side, when someone buys a car from out of state?

My question is perhaps more appropriate for something like an r/asktitleclerks but I don’t think any sub like that exists lmao (and questions like what is the profile of buyers is still relevant to sales). I recently started a job with a company that helps dealerships process the titling/registration for out of state transactions. I have a very limited window into how the rest of the chain works and it’s making me so curious like, what exactly we offer dealerships (is this service useless and my job security poor lol) and how all this works “normally”. I’ve never bought a car out of state before so have no idea how this works outside of our service.

I’m 10,000% sure this varies by state and dealership but generally do you “just” give the buyer the temporarily plate and reg from the dealer state and the documents they need to take to the DMV in their home state to pay taxes and get registered? Or do a lot of dealerships have their title clerks do this “in house” and work with the out of state DMVs themselves? I assumed the former but the amount of dealerships that send us filled out title applications (that’s our job) makes me think at least some did the latter and that’s why they use us now to save time or whatever. Do the buyers ever have to come back in to your dealership because their state DMV requires something non standard (or your dealer didn’t do it correctly because you’re not familiar with it lmao)? How common is that? That seems like a huge downside of doing it this way to me but I also have no idea how common it would be when the buyers are left to handle it on their own.

I feel super dumb for asking (esp when I could probably ask around at work, I know I’m weird barely knowing anything about the company I work for but I’m a low level clerk) but like, are people buying cars entirely online now? I see SO MANY shitty cell phone pictures of drivers licenses it would make sense if people were submitting their paperwork online and not at the dealership where there would be a scanner (a totally adequate printer/scanner is like $50 these days it blows my mind how many people apparently don’t have one but I digress). But then other parts of what I see at work make no sense, like the relative rarity of e-signatures (on forms where it’s allowed) or delivery fees on bills of sales. In the case of online sales, do you have to ship the POA etc to the buyer to sign before shipping the car? (I assume if it’s pick up they would do the paperwork in person when they get there)

Ngl I still barely have a clue of what the profile of car buyers who need our service are. There is a skew towards rarer/more expensive cars people would travel for (but I do still see a lot of “normal” cars too) but beyond that I really don’t know. People who live close to state borders where the nearest dealerships are on the other side? People with a summer/winter home buying a car while at the home they spend less than half the year at? People who mistakenly believe they can save on taxes by buying in a lower tax state forgetting it’s based on where you register? People traveling to states where doc fees are capped? Are there really that many customers buying out of state? What is the typical profile? My job as convinced me it’s such a hassle I would avoid it at all costs 💀