What if you need more than 2TB of iCloud storage?

Not what you're looking for but may help -- see the following from What happens to your iCloud storage when you sign up for Apple One - Apple Support

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.

This is primarily a user-to-user support forum; other Apple users like you. You may want to also post to Apple via: Feedback - iCloud - Apple

Couch 22 Said:

"What if you need more than 2TB of iCloud storage?: I find it absolutely ridiculous that Apple does not offer a higher iCloud storage plan than 2TB. I have a 1TB iPhone 13 ProMax, 1TB iPad Pro, AppleWatch, 5 Apple TVs and a 1TB Mac Pro.[...]"

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Notes on Storage:

A. iCloud: Not so long ago, Apple doubled the amount of iCloud Storage for the same price. They may do the same once more. Time will tell.

B. iPhone:

Look into clearing internal space. SEE MY Two User Tips:

• How to Clear Space from your Mobile Device, and What to Clear: - User Tip
• How to Clear "Other" in your iPhone's Storage - Use Backup - User Tip

Here you're talking to users just like you, Unfortunately we don't have access to Apple's products and services strategies.

You have an option that is to subscribe to Apple One with 2TB and add an iCloud+ plan with also 2TB, so 4TB total.

You can give Apple a feedback concerning your demands and remarks about it all in here Product Feedback - Apple