I do wood working so I feel I can offer some advice.
First off please remove the dash from the car when you work on it. You dont want to spill anything in your car. Especially anything to do with finishing wood.
2nd, that piece is $200 from Tesla. If you screw it up it's not the end of the world. Easily replaced.
If you want to keep the color this is what I would do. Tape everything with blue painters tape that isnt wood. Take your time and do a good job. Sand it at 220. Go with the grain and dont press hard. Do not use a lower grit at this point You want to try and even it out. If it doesnt even out step it down to 150. Once evened out use compressed air and remove every spec of dust. Dont rush it. Apply a matte poly in very light coats. You can use t-shirt rags they sell at lowes or Home Depot or apply with a good quality brush. Do not buy a brush for $.99 Spend $5+ and make sure it's made for finishes. I recommend this poly
https://www.amazon.com/gp/product/B00714ZOOA/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 Satin poly will have some gloss and if you dont do a good job applying it you will see mistakes. Some areas will be glossier than others. Stick with matte. The poly I linked is water based so no odors and it dries in 5-10 minutes. I would just do 1-2 coats depending on coverage.
It has zero gloss and its very forgiving. Between the poly, brush, tape, sand paper, and a few hours of time you might just want to replace it. You can mess with your current dash by trying a different color stain, carbon fiber, or whatever.