Yes, the ASUS ROG Maximus Z890 Hero Btf motherboard fits into the case as it supports the E-ATX form factor, which is compatible with the case. The case supports motherboards in the ITX, mATX, ATX and E-ATX form factors, so the ASUS ROG Maximus Z890 Hero Btf can be installed.
Up to 2 HDDs (3.5 inch) and 2 SSDs (2.5 inch) can be installed in the housing at the same time. There are 2 internal 3.5-inch drive bays and additional space for 2 SSDs.
So, if the description says that the screen is 14.5 inches, that actually fits the second generation. But the technical data says 14.9 inches - and that is clearly the third generation. According to the manufacturer (HYTE), only the cases with the larger 14.9-inch screen have been delivered since October 2024 anyway. This means that even if the description is a little confusing, the case on Galaxus is almost certainly the third generation.
The product "Y70 Touch Infinite" is a new PC case from Hyte and is not offered as a secondhand product. It is a modern midi tower case with an integrated IPS touchscreen display and is suitable for various motherboard sizes.
The housing is only supplied by the supplier when an order is placed, which is why the delivery date is being pushed back further and further. However, the delivery deadline is currently in December.