If Generative Upscale occurs in the cloud, why isn't it available via Lightroom for iPad?

Perhaps this is incorrect, but my understanding is that Generative Upscale is a process that occurs “in the cloud”, not on my computer, hence the use of Generative Credits. This may well be why GU is not available using Lightroom Classic. 

However, if it is the case, where processing occurs in the cloud, why wouldn't GU be available in the iPad version of Lightroom?

I’ve read the answers provided by Adobe’s AI help, but they are rather vague, even cryptic in their choice of language.