The short answer is yes.
SDBs without a rocket assist would only need a "ripple" release. The key setting would be the "interval" between releases. With an interval of .25 seconds, 16 SDBs delivered in 4 seconds.
An air launched rocket assisted SDB would a bit more difficult, but certainly doable.
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Also note that the impact angle on SDBs can be set. This would make them ideal for trenches.
I believe that some if not a lot of military aid is not being announced I would be curious and hopeful that the large stock of cluster artillery ammunition the US still has in stock has been sent. We used them to great effect, road of death in Kuwait…., would be ideal for trenches and suppressing and destroying enemy positions