I think Apple is, partly because they outsource a lot of their energy to the other clouds, partly because they have stronger PPAs with actual solar power plants.
According to statista, the leaders in cloud marketshare are (in order): AWS, Azure, and GCP [1]. I don't believe Apple has any significant cloud offering.
There is a question about the sustainability of consumer electronic devices but that's a whole different can of worms. As an aside, I appreciate how Apple pioneered long support commitments in phones.
Apple does have four large data centers in America and one in Europe. Their first-party datacenter energy footprint is about 10% as large as Google's, and they claim to have 100% renewable inputs. This is a brilliant PR strategy because Apple is a huge customer of GCP, AWS, and Azure for cloud storage and other cloud services on behalf of their users, but all that energy shows up on Google's, Amazon's, and Microsoft's sustainability reports.
There is a question about the sustainability of consumer electronic devices but that's a whole different can of worms. As an aside, I appreciate how Apple pioneered long support commitments in phones.
[1] https://www.statista.com/chart/18819/worldwide-market-share-...