Can you get more than 2 TB about iCloud storage?

From Apple's Knowledge Base:

After you subscribe to Apple One, you can buy more iCloud storage if you need more. With both Apple One and an iCloud+ plan, you can have up to 4TB of total iCloud storage.

(230421)

Are you sure? I just checked Apple One - Apple and it only lists up to 2 TB for iCloud+.

No. 2 TB is the upper limit.

Yes, by signing up for both it and Apple One. If you get a Premier plan, sign up for iCloud+ afterwards, and again if needed.

(230420)

Thanks!

What is Apple one? how does it differ from iCloud?

See the link in my post above.