Maybe an electric toothbrush that has fun characters on it. They also have these half moon shaped toothed brushes that are really easy for kids to use and they have a sideways action to clean the teeth instead of up and down and use silicon bristles instead of the normal white ones.

Character toothbrushes are always fun. Doing it with mum, dad and/or siblings. An electric character toothbrush could encourage teeth cleaning

When my kids were younger we had this wee book called Karius & Bactus. It’s a great book for kids about tooth hygiene
https://en.wikipedia.org/wiki/Karius_and_Bactus

Keep doing what you’re doing but don’t make it a battle and be gentle with your little one.
Have you tried a 3D brush ?
My youngest hated brushing teeth too.
We turned the roles a bit around. First she could brush my teeth, then I could brush her teeth

I bought my twins a paw patrol one because they love paw patrol.

There are apps you can get to brush along with that make it fun. My daughter used a wiggles one and the boys loved it when they were little.

Another great article filled with GREAT information Thank you! LOVE the “extra fun” you shared. Candy Crush

Another great article filled with GREAT information Thank you! LOVE the “extra fun” you shared. Drift Boss

The round tooth brushes, flashing tooth brushes, or an electric one?
It is a sensory issue, dont get mad at her.

Possibly look at different toothpaste.

A quality novelty toothbrush chosen by a a child is always a good fun incentive for brushing teeth.

sorry forgot to add the link for the 3 sided tooth brush
https://sensoryspace.com.au/products/kids-three-sided-sensory-toothbrush?variant=41954252095657&currency=AUD&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&https://www.sensoryspace.com.au&utm_campaign=gs-2021-02-20&utm_source=google&utm_medium=smart_campaign&gclid=EAIaIQobChMIpYaymf3P_wIVzk8qCh0cZgBdEAQYCiABEgKyHPD_BwE

We have good experience with * the U-shaped tooth brush and with * the 3-sided tooth brush

https://sensoryspace.com.au/products/rainbow-u-shaped-sensory-toothbrush?variant=42022434734249&currency=AUD&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&https://www.sensoryspace.com.au&utm_campaign=gs-2021-02-20&utm_source=google&utm_medium=smart_campaign&gclid=EAIaIQobChMIpYaymf3P_wIVzk8qCh0cZgBdEAQYASABEgLzc_D_BwE

Have you tried novelty toothbrushes? Such as character ones?. Both our children love their bluey toothbrushes and brush twice daily. We have an 18 month old and a 3 year old. Albeit, they certainly don’t brush like we do but they enjoy the independent task each day.