Running Intervals (HF/Pace) with proper control?

Hi,
I just finished a 10k Trainingsplan with Adidas running and want to continue with planned trainings without adidas running.
However, I find it very hard to have a good
Training experience with Intervall Trainings where I need to follow a scheduled pace or HF intervals.

I can set the goals and such but find it very hard to have the necessary data at hand. Especially for pace, since the apple „pace“
View is not available for Intervall.

I used a garmin the other day where it just worked.

Anyone doing Intervall Trainings who can share how exactly with which data screens you follow your pace/hf goals for each interval?