Welcome to the forum!
Ideally, all the pics in the observation would all be the same individual bird. If they are all the same species but the same individual isn’t present in all pics, this isn’t ideal, but it will work out. I can’t tell in your observation whether the same individual is present in all pics, but it looks like at least some of them show the same individual.
So, in short, if the same individual is present in all pics, even if there are other individuals of the same species present, it’s good!
If there are pics that don’t have the same individual in them, they should be in separate observations. There’s generally no issue with making a few observations for different individuals at the same time/place/location (just don’t make 100!). In fact, sometimes this is very useful as they can show different life stages, sexes, phenology, etc.