There were significantly more weapons found than that. The videos of Shifa from the first couple days on the IDF official channel alone show far more than “11 guns”. This link has a picture from Shifa with dozens of guns.
The idea that all that the IDF found at Al Shifa was a handful of guns is simply not true. It’s gaslighting. It’s as insidious as all the “Israel kills 500 in hospital airstrike” nonsense we heard at the beginning of the war.