Is there any way to get the t value that correspond to specific arc length of a quadratic bézier curve.
there is a way to calculate the arc length for specific t value
Calculate the length of a segment of a quadratic bezier
if there no way to get it, How can I get points with equal fixed distance intervals like this
There's no closed-form formula, so you'll need to use numerical methods of some sort.
The simplest approach would be to just approximate the curve by a polyline. The relevant techniques are outlined in the answers to this question.