You are taking basal bolts regimen, which is considered the most physiological way to take insulin. The insulin dose needs to be adjusted till you reach your target glucose, ie, FBS 100, PP 140. Sometimes insulin injection technique may be wrong wherein insulin may not be reaching your circulation
Next Steps
Change injection site. Monitor sugars regularly and scale up the dose as needed. Newer medications like SGLT2 inhibitors May help
Health Tips
Diet and exercise would help