I think there is a lot of uncertainty about what it means, but I certainly noticed this. There is a Q post that suggests 11.3 pertains to Kevin Clinesmith, but I don't see any significant action related to him, like I do here with Charlie Kirk. Others say it pertains to Law Of War Manual Chapters and sections. Still, others pointed to a recent software version update on X (twitter) v11.3. So, not a lot of certainty, plus double meanings exist. Could multiple meanings exist? I don't know. But, of all the 11.3s that we've seen so far, this one lines up with post 34 the best.

The post that lines up with Kevin Clinesmith, may be meant to lead us to understanding that 11.3 are initials, but then again, I can only speculate.