Of course they are amplified. Why shouldn't they? But qPCR is all about efficiency. You are not interested in the product but in the process of amplification that tells you something about the starting copy number. Therefore, you want to have targets that are short and are easily amplified.

Dominik is right, it is possible to amplify several Kbs of regions with special protocols and enzymes. It is nothing really new.

https://www.thermofisher.com/tr/en/home/life-science/pcr/pcr-enzymes-master-mixes.html?open=longpcr

Real-time polymerase chain reaction (real-time PCR) is a widely used method for amplifying and quantifying short DNA fragments, typically less than 200 base pairs (bp) in length. This method is based on the simultaneous amplification and detection of DNA during the PCR reaction, and it is commonly used in a variety of applications, including gene expression analysis, pathogen detection, and genetic typing.

Products larger than 200 bp are typically not amplified effectively in real-time PCR for several reasons:

For these reasons, it is generally not recommended to use real-time PCR to amplify products larger than 200 bp. If longer fragments need to be amplified, alternative methods such as standard PCR or long-range PCR may be more appropriate.