Help me build a 2x11 crankset with a 40t/42t big ring and bashguard
Regarding removing a ring from an lower end triple crank. That won't work: the two rings you are left with will be biased toward the outside of the bike; the spacing of the rings on a 8 or 9 speed crank will be too wide to work well with an 11 speed chain.

You should check that you frame has chainstay clearance for larger rings. This can be a problem on newer bikes that are designed for small chainrings.

To select a crank that is compatible with your frame you need to consider two things, the bottom bracket standard and the chainline.

You say you have a frame that takes a 92mm pressfit BB, that's either a BB92 compatible with Shimano 24mm axles or a 392EVO compatible with 30mm axles. See here for a summary of BB standards. If you  have a 392EVO and you want a Shimano crank there are adapters to step down to 24mm axles, or manufacturers like Wheels Manufacturing sell BBs that adapt from a frame BB geometry to a crank BB geometry.

Chainline is connected to the rear hub spacing. Wider hubs require wider chainline. Manufacturers specs will tell you what chainline a crank provides and rear spacing (sometimes called OLD for over-locknut-distance) compatibility. As an example Shimano provides extensive and detailed specs. Here is the MTB cranks spec page.