53mmol/mol is only just in the diabetes zone so it should be very possible to reduce it by dietary changes and increasing exercise if you can. Many do find their blood pressure reduces when they get better management of blood glucose.
Have a look at this link for some ideas for modifying your diet and some do's and don'ts. It is a low carbohydrate approach which many find is successful at both losing weight if you need to and reducing blood glucose.
https://lowcarbfreshwell.co.uk/
Some find a low calorie or shakes -based regime gives them a kick start but whatever you choose has to be enjoyable otherwise it will not be sustainable.
I went low carb and it has just become my new normal and I do not miss the high carb foods as there are plenty of tasty alternatives.