Apple Notes on iCloud not synchronizing with brand new iPhone 12 Pro Max

Greetings, everyone

I have more than 2000+ notes on my iCloud account

Many of these have .mp4, .mov videos and .jpg and .png images

My main desktop computer is a 2018 i7 Mac Mini connected to the internet via fiber optic

First of I'd like to underline the fact that various iCloud synchronization processes have started taking much longer than they did, let's say around 2017 when iPhones were much less dominant in the market. I imagine this has something to do with Apple's server throughput capacities. I am not exactly satisfied with the quality of service that iCloud provides for a monthly payment of upwards of $10 for 2TB of storage

However, my most important question regarding this topic is this:

why did Apple Notes not even start synchronizing on a brand new fresh out of the box iPhone 12 Pro Max after more than 24 hours?

The phone is connected to a 5Ghz WiFi. I've already tried restoring it (even though it's 100% new) hard resetting, switching off note synchronization in iCloud settings and switching it back on. Essentially all of the standard options did not provide a resolution to the problem

Apple, what's going on with iCloud throughput? Maybe it's time you should start investing more into server rooms if the services that you are providing do not function as advertised?

Even in case of normal synchronization via Mac Mini a note edited on Mac OS takes up to several hours to get updated on iCloud.com

Kindly provide a detailed reply