A 2-mile long bridge sounds massive, but do-able. Louisiana has a 20+ mile bridge over water.
Pensacola here has a 3 mile bridge and there’s a 7 mile bridge in the Keys...........
My big concern if I was engineering it would be Sicily’s motion with respect to the mainland. The motion of the African plate causes it to move significantly every year. I don’t know how you engineer a bridge to handle that.
That would be the Lake Pontchartrain Causeway.
Here it is.
Doesn't look much like a suspension bridge, does it? You might want to study the Straits of Messina a bit more.
Louisiana has a 20+ mile bridge over water.
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Lake Pontchartrain Causeway.
Driven it. Motorcycle. Weird.