Hi, Ican only tell you what happen with me.
When pregnant with 1st baby, employer did a risk assessment. This was no different from that for any other pregnant lady.
This was reasessed due to my diabetes, at the point where my diabetes had an impact on my pregnancy and my job. I lost hypo awareness, adn work then sent me to occupational health, who advised that I did not work alone, evefr. This was specifically becasu eof the loss of hypo symptoms, and not becasue I was pregnant.
At the time I worked in a lab, often, while not alone, not with anyone else within shouting distance. The risk assessment was mainly based around chemical and any impact on baby.
For my second baby, I had changed job, and, mainly sat in teh office on teh phone, although I was also on the road alot. There was no need 2nd time round for the fact that I was diabetic, mean I needed an extra risk assessment.
For yourself, I suspect it will be similar. The fact that you are pregnant will need need to be assessed. In theory, your diabetes will not have any more impact than it does today. Of course, like for me, this may not be the case all the time, but unless you have a specific issue, that needs to be assessed, I don't think any extra measures, other than the normal pregnant lady ones needs to be done, in the early days.
All the very best of luck!