You might need to take a urine sample each time too, I had my first one a few weeks ago and it had said on the letter, I didn't have a sample pot so didn't go to the toilet before setting off so I could ask reception for a pot and fill it there. I got given one at the end for the next time.
Obviously slightly different for me as I'm type 2, but they were looking at HbA1c results, asked about my finger prick results as I do some testing and gave some advice. And prescribed the 5mg folic acid as said above even though I said it was more than 3 months at that point before my earliest planned start point. They also checked that I had kidney function tested within the last year, not sure if that was because they wanted to start me on metformin or something they do for everyone.
I actually saw pregnancy specialist DSN and dietician together so it's possible your area might do that too. They told me that when I do conceive to let them know, and pregnancy clinic will be the same day of the week but the morning instead of the afternoon. And set up review appointment with pre-pregnancy clinic