A few years ago (after I was already using Huel for Breakfast & Lunch), I decided to up my training intensity so did a load of reading into nutrition for athletic performance. I worked out my ideal calories and macros based on all the current research, with the intention of modifying my diet/huel intake to match. Turns out for training days Standard Huel was spot on, (Black was better for rest days).
Over the course of my journey I have simply focused on eating a sensible level of food based on my activity level, and allowed Huel to worry about my macros. The weight loss then just happened naturally.
I set my calorie intake to a sensible level for my size and activity (sedentary job, plus 1 hours of intense activity per day) and stick to it. I weigh myself every day but only pay attention to the monthly trend. If I am loosing or gaining weight when I don’t want/expect to I adjust my intake a little and wait a month and see what happens.