I think Elon was always what I'd call "silicon valley libertarian" at best. Nothing he's said or done is really all that surprising, if you go back and look at the things he said and did 10 years ago.
Agreed. EVs and solar are generally considered "lefty" (unfortunately), and I can't think of anything he espoused outside of that which could be considered "liberal".
Elon Musk has greatly accelerated green energy innovation through EVs, battery technology, and solar. Are these actions appropriately described as "alt-right"?
When people today talk about Elon Musk's political views they mean his sudden right-wing radicalization in 2022 that happened exactly when he was tipped off about sexual harassment allegations coming his way.
Futuristic technology has certainly been right wing for as long as that has been a concept. Looking to history, some of the most incredible technological breakthroughs any of us can think of, came from what is considered the most extremely right wing society to have existed.
Elon Musk also came out as an alt-right troll when he was tipped that an expose about sexual harassment of a flight attendant was coming his way.