Multi-missile sprays aren't a thing (yet) with ATGM systems. As Vespers War already stated, SACLOS (and MACLOS of course, too) systems don't support this. You would either need multiple transmitters or wires to guide multiple missiles, or support commanding several missiles at once in a different way, e. g. frequency hopping, digital commands with each missile owning a different address etc.
Fire and forget missiles make this easier, but you still need to make sure all missiles know their intended target. Otherwise, you might waste multiple missiles on the same target with other targets "going empty".
Also, until so far, ATGM designers focussed on getting target acquisition right as this basically meant safe kills. Why shoot twice or more often, if one hit guarantees the kill? Only with (hard-kill) active protection systems on targets might saturation attacks prove an effective and efficient vector.
With the borders between ATGM, armed drones and loitering munitions or even active mines blurring, swarm/saturating attacks will become a thing. This has already started. For T2K that's still scifi, though.
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Liber et infractus
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