What bits do you recommend for a horse that has always used a hackamore but never responds to stops and steering her?

There is a bit developed in Canada called the Hackabit it combines hacamore nose pressure and full cheek bits with a wide variety of in the mouth bits with multiple options for rein placemat for more or less pressure Lilly Keenan uses it on her Grand Prix horse I love it it’s gentle yet effective

Full cheek bits are great for helping horses with steering issues

Full cheek double jointed lozenge. Hands down.