Zdigital2015
macrumors 601
You are correct, 32GB max - https://ark.intel.com/products/149091/Intel-Core-i7-8565U-Processor-8M-Cache-up-to-4-60-GHz-It can? I take the "Memory: 16GB dual-channel (fixed)" to mean that it's soldered and can't be upgraded at all.
I also don't believe Core-U CPUs support 64 GB.