Doing business with a body shop that has a good working relationship with insurance companies is most important. Body shops are not all created equal. Small insurance claims today are most often handled by correspondence (and pictures) where only the big losses are assigned to their adjusters. Sounds as if you'll have an adjuster.
If your car is a total loss, you should let the insurance company's "loss department" offer a price and see if it's fair--as a start. Splitting the NADA Retail and NADA Trade In is generally a fair price--adding and subtracting for options and/or high/low mileage. Then hit'em up for sales taxes on the replacement too. Your 2018 Subaru is probably worth between $26K and $30K approximately.
Note: I was in the automobile business 24 years, and had to get into the middle of hundreds of total losses--making sure my customers were getting fair values for their wrecked cars. I also have a kamakazee daughter that's totaled out more than her fair share of vehicles too.
The automobile world is in turmoil right now with electric vehicles going to be a bigger part of our lives. We're seeing Ford investing $15 billion to build a West Tennessee truck factory and battery factory. GM is building a $2 billion battery factory in Spring Hill. The list goes on and on. But someone's going to have to pay for those factories--long before the cars are put on the road.
I see YouTubes all the time documenting the difficulties in keeping Tesla EV's up and going, and mechanical repairs are simply out of sight. A replacement battery pack, for example, is $21,000. I also see wrecked Teslas requiring months and months to get repaired--and customers' rental car insurance don't cover 6 months of a rental. Customers are complaining that their physical damage insurance is twice the normal premiums--out of sight. And it's just too easy to take a $39K Tesla and getting a delivered price of $60K.
Times may change, but we take too many long road trips and I don't care to plan out my routes according to Supercharger locations. I have 500+ mile range out of my Toyota Venza Hybrid (42.5mpg) vs. a Tesla's 200 mile range. I'm not ready to jump into EV's--given our lifestyle. Good luck to you on your negotiations.