Thank you for your question! Botox and fillers are a good option to help with the wrinkles in the knees. Ultimately, you'll need an in-office consultation with a skilled provider to determine which product is best for you. All the best!
I recommend following up with your injector. Every practice is different, it would be best to have an honest conversation with your injector to see what can be done to make you happy. Best of luck!
I think you'd benefit from some tear trough filler, but also you might consider some PRP/microneedling. Your dermatologist can also guide you about using the right creams/serums under your eyes to improve hydration and help with the fine lines and darkening to some degree.