1) Diet: Low carbohydrate diets are one technique: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9437985/
"In this randomized, crossover intervention trial among adults with prediabetes or T2DM, the 12-week percentage change in HbA1c, the primary study outcome, improved significantly for participants on both diets"
2) Exercise: High intensity training and strength training improve blood measurements. https://pubmed.ncbi.nlm.nih.gov/30270019/
"From a practical clinical perspective, the performance of [strength training] + [high intensity interval training] may be advised for additional benefits regarding insulin dosage reduction."
In short, cut out the bread, deserts, pizza , lift some weights and do some sprints. Keep doing it.
Pubmed is great resource. Search for terms like "clinical trial" "diabetes", "HIIT", "mediterranean diet", VFKD. [edit: I do want to emphasize the term "clinical trail". Diet and nutrition research has a lot of other types of research. Often the quality suffers. Clinical trials, and hopefully other clinical trials that verify earlier findings, are the best.]
Getting on top of the situation early will save you a lot of grief ( and doctor's visits and paying for drugs).