2 piece suggests indicates External bearing type, and several on that list are good old square taper or 3 piece ..
Indications in BB column shows that , exo will suggest the Fsa ones as external ..
[Stronglight mygal came on my Koga as a single 39t cog with a chainguard, they're discontinued , perhaps name got recycled]
I have been satisfied with my last upgrade of Campag race triples in 50-40-30, then as the 30 is on a 74mm BCD
substituting a 24 t for the 30, or in the case of the 52-42, a 26t.. in a Campag 111 square taper BB.
But its a new part of an older , friction shifted drive train , so lots of combinations work fine
because I dont expect electric switch like instantaneous gear changes like the post industrial
computerized child has been given [advertising] to expect.
My Go to bike has a Swiss made 2 speed planetary gear crankset, it happens to install like a 2 piece ,
but both crank-arms are removable, and the bearings are internal in the frame when installed.
Herr Schlumpf turned the humble 3 speed into a mountain climber..