Very nice collection!
Interestingly, only a couple (including no. 17 and Tissot’s 24) distinctly show the separation of the crowd, which was an essential element to Jesus’ miracle, revelation, and instructions to the Apostles.
Anyway, any thoughts on why many Medieval/Renaissance paintings depict the Apostles as old/older men?
Beyond artists presenting the truism that generally it takes years to acquire the authority they attained, no.