That's quite a first post full of a lot of assorted stuff.
You say you wish to reduce oil consumption by using a higher grade oil, but then delve into a discussion (complete with oil companies hiding stuff, and that Mobil 1 0W-40 is a "crappy" oil). Which is it? If you wish to try a different grade than your current 5W-30, then find one that has the approval required by your vehicle and try it. The base stock composition is largely irrelevant to that discussion, but I will say that within the VW approval you won't find a massively thicker oil since VW specifies an HTHS for the approval and that will make the various oils similar to each other.
Option 2 is Liqui Moly Molygen 5w40. (Liqui never tells that it is fully synthetic or PAO anywhere) What is this oil made of? Only green color paint and lots of advertisement is just steering me away from the brand rather than loving it as they hide the real specs.
That particular oil hides little in their PDS. They say the following:
LIQUI MOLY ALSO RECOMMENDS THIS PRODUCT FOR VEHICLES OR ASSEMBLIES FOR WHICH THE FOLLOWING SPECIFICATIONS OR ORIGINAL PART NUMBERS ARE REQUIRED:
BMW Longlife-01 (bis MJ 2018)
Renault RN 0700
Renault RN 0710
VW 502 00
VW 505 00
Which means that it has no approvals at all. It is recommended for those approvals but that's as far as it goes. Doesn't mean it won't work in those applications but they are't hiding anything.
What do you really want here? Just to reduce consumption? If so, then try another oil such as the Shell Helix. That is one of the best oils on the market and carries the approval you need.