Tesla accepted bitcoin in the past, but it is no more accepting bitcoin again for now. But there are many companies and sites that are accepting bitcoin through payment processor.
Usually, the companies who will accept Bitcoin will continue to accept Bitcoin until there is any change in the laws of the country or any valid reasons.
As far as Tesla is concerned, that was a manipulative move by Elon Musk as he wanted to pump dump the coins at that moment and it was easy for him as he is an influencer and a big business owner. You never know if Tesla will start accepting Dogecoin anytime in future, we never know.
Leave alone Tesla, other companies who accept bitcoins are more serious about keeping the bitcoin adoption/acceptance forever.