Whether you like it or not, the simple fact is that this is an ordinary reception for the diplomats. There is nothing special or odd about this stop the lame accusations.
No one would send intel agents they want to embed with the shady Nisa and especially not on a publicly visible occasion like this.
The muscular men are most likely security, and in the first image on the top left of that Twitter post, you see men in suits that appear like diplomats. There is a stark difference between the reception of these men; in the first image, you have Somali representatives lined up greeting the incoming diplomats, and in the other three images, it's just a casual greeting.