Unless you have identified personal triggers I wouldn’t say there’s any overlapping concerns.
There’s no advice given to type 2 that has caused me any issues. I have eaten very low carb/keto for 3 years with no issues. I avoid no foods due to diverticular disease, only seek avoid constipation and or straining. (Sorry if that’s tmi) but as neither have ever been a problem despite the totally (asymptomatic) diagnosis I believe my condition is hereditary and not caused by my diet/bowel habits. I have read seeds can be discouraged but have also read this is unsubstantiated advice. They cause me no issues.
as to what to eat for the diabetes then have a look at the link in my signature which gives some exceptionally useful information and ideas.