Normal is that you drop off your car when you are supposed to. (appointment time).
They will text you when it has been checked in and being serviced.
They will text you when it has been completed and include an invoice.
You will arrange for payment and go to service center to pick up your car.
It is elegant, efficient and cost effective for them.
They do not want to do tons of chit chat back and forth. Have additional items you want handled outside what you made an appointment to have addressed.
They have very limited loaners due to covid liability and expense/hassle of deep cleaning between every user. Also additional exposure to Tesla employees. Mostly they just want you to bring a pick up driver or they will gratis supply you with Uber/Lyft credits.
They do not have a fleet of Model 3/Ys sitting around as loaners as there is a long waiting list of customers for every car they can produce.
Customers tend to want additional items addressed, even though Tesla might not have the necessary parts or a technician familiar with your issue sitting around with nothing else to do. They do not want to deal with customers wanting to negotiate repair pricing, how an issue is being addressed, or specifics of a repair. They are not very touchy-feelies.
They do not want to adapt to your personal issues of wanting your car washed, it done when it is convenient for you to pick it up, how you need to stay late at work, how your car compares to others, if you can have your current car upgraded to some of the later offerings etc.