Best diets to follow? For weight loss + COPD management

Hey everyone,

Wondering what kind of diets everyone consumes?

My diabetes screening (hb1ac) actually came back okay, so no need for me to continue Keto on that front... However, I do need to lose weight as my BMI is still 29.7

What does everyone here recommend as being the best they've found and the most helpful to minimising their lung disease from progressing as much as possible?

Thanks so much in advance!

P.s. my CT scan is next month, and a round of PFT scheduled for October. Then no follow up with the Respiratory Consultant until March next year. Any idea what I do in the meantime or how I get through lol? I looked into private and may do that also (UK based) thanks to 1FatFannys great advice!