From my memory some of it looks vaguely similar to the one I had to do when I went on my carb counting course (in 2019) - I had to do a diary like that for 4 weeks in total
Though you seem to have two entries for 8am on day 1 (note: I'm not sure what all the abbreviations are - I presume you've been told what they are though)
Its just to track what you've been eating (carb-wise) and your bloodsugar before each meal and other times if you do it as well for a good number of days so they can guesstimate your carb ratios for different times of the day, and work out if your basal needs changing