You don’t say what diabetes you have ( if any) ,for how long or what age you are. ( or what possible medication you are on
I am T2 for 15+ years , 65 , Both my feet can be fuzzy for long periods BUT I still pass the diabetic " touch with a nylon whisker " tests for feeling. The fuzziness varies with the time of the year , the weather , my mood ( and possibly blood sugar levels which are getting under better control ( HbA1c ca 7.5). If the numbness is sufficient to fail the touch test beware of an possible injury.PLenty of general advice on this forum for that.
Standing , working in tight shoes , all can give you numb or painful feet.( Particulalry when you get older I may say!) Concentrate on getting comfortable footware.This is possible even with steel toecaps which I use in the garden.