Hey beautiful, you are at 34 weeks and there are exercises and helps that you can use beside ECV.
Have you heard of Webster by chiropractor? Dr Melanie of One Spine is someone you can consider...
Check out Spinning Babies exercises as well. The balance always comes first so I will encourage you to prioritise forward leaning inversion before using the rest of the exercises. Use the lower height for this exercise, shorter duration (when in inverted position) and more frequency per day.
Also, are you open to second opinion by other obstetrician? There are quite a number of good obstetricians you can approach. Breech delivery is another option by skilful obstetrician.
Always, talk to your baby and this is also an amazing prenatal bonding time!