Does fitness plus have stretching options only?

I was able to find it just now. Maybe they added it in the past month. Just submitted a request for stretching only routines

Hello PizzaKween.

Thanks for reaching out to Apple Support Communities. We see that you are looking for stretching specific workouts with Fitness+ . Unfortunately, there are no stretching only workouts, however we would recommend submitting some feedback here: Product Feedback

Cheers.

It's here;

Fitness+ feedback

It would be awesome if we could give feedback on the fitness+ app, however it does not exist in the product feedback link you provided.

It does now!