No car manufacturer ever has approved their use or given specs for their use so don't expect Tesla to. They're not the official rack. Had the official rack been out earlier, that's what I likely would have gotten. That said, I've gotten thousands of kilometers hauling canoes, paddleboards, roof boxes full of skis and gear with my SeaSucker Monkey Bars and hundreds more hauling three mountain bikes with the Bomber bike rack. All trouble free and I love their ease of installation and the fact that I can put them on any of my vehicles without expensive and time consuming adapters and with only a minute our two installation time.
In comparison, I've watched videos of installation of the Tesla solution -- what a pain that looks to be to install!
As long as you keep the loads reasonable, I doubt the weight will be the issue. My bigger concern is the suction force of the suckers on the small area of glass. So far so good for me, but there have been a report or two of the suction cups cracking the glass roof and no help from warranty. Caveat emptor.