One of the nice designs of MSFS is many of its cockpit instruments can be used across different aircrafts (despite practicability in real life), which in a way simplifies the construction of DIY cockpit using my MSFS Multi-shared FIP gauges.
Via the table, one can check out the usage of each instrument on different aircraft according to the reference number or alphabet assigned to them, and further find out what gauges are included or not included from the cockpit layouts captured below.
Update 1: The number and alphabet indications are added to the corresponding gauges in respective cockpit images for clearer references.
Update 2: In addition, I have added this MSFS Gauge Table to the Menu in the top of the page under MSFS Category.
Very likely in the foreseeable future, all gauges on default MSFS aircraft, except those glass cockpits, can be shown on the FIPs, which is a bit difficult to realize in X-Plane or P3D. I am excited to looking forward to this as well.