I could easily see that being down to Intel. Their sales are not very strong at the moment and falling, if the tech trades are anything to go by, so I can easily see them trying to compensate by upping the cost of their CPU's, sadly
Not at the moment, though it still comes in the better part of £100 less than an RTX 2060 + 8750H
I believe the motherboards reach PCS with the CPUs and GPUs already attached (unlike a desktop PC where they install the choice of GPU/CPU. So whether there will be 8750Hs and 1660 tis depends on Clevo, Tongfang, etc.
Hopefully the 9750H's price might come down in time...