Finally! I have found toothbrush heads for Realme M1 electric toothbrush.

Realme M1 toothbrush head

Model: Realme M1 electric toothbrush
Color: White
Type of head: Whitening

I really love my Realme M1 sonic electric brush it's very functional and has pretty much solid built quality. Battery backup is extremely on higher side I barely charger once in 6 months if used once/day.

Unfortunately they provided only 2 brush heads when I purchased it back in 2022 may be ;).
I was looking for the replacement heads all over the places it's always out of stock and realme support confirmed that they have stopped the production of this product.
Shit now the whole problem was to find it, found the suitable one finally after ages from Alixpress.

My friend will be coming from USA to India in September.
I have total 12 units white color ones.
Can trade few like (3-4 only) becoz each head have life span of 3-4 months max.
So technically owning 12 will give me for at least 3 - 4 years.

Let me know if someone needs them as I see most of them are still looking for it.
I will be keep updating how it fit's and quality of it.
Just posting up-front.

DM's are open