I've had 2 babies with a BMI > 40, in two different countries.
I got so much more hassle for my weight in the UK than in the other one, where they still told me the risks, but adult to adult, rather than as some kind of judgmental blaming.
For the second I had the Glucose tolerance test (for the first one I declined it, and nothing more was said) - lots of assumptions and meaningful looks as I nearly fainted during it after drinking the syrup - came back perfect.
Also declined the aspirin (again, only suggested in the UK) after reading that it often causes pregnancies to go overdue, and I went to 40+10 last time, plus I didn't have any of the issues it was given to prevent (this may not be the case given your history - but read up, don't just take their word for everything) - the consultant was baffled, but still not willing to say why I should have it, apart from 'BMI > 40, it's policy' so stuff them.
Honestly, it's not your BMI causing problems - don't let them fob you off with that - the UK is awful for blaming everything on weight and not listening to what else is going on.