You can see many suggestions about hair extensions. Maybe you applied some of them, but did not get enough results. Because some of the things you do will prevent your hair from growing no matter how much you care.
First, bad nutrition is one of the factors that prevent your hair from growing the most.
Afterwards, the wrong care products you apply to your hair will prevent your hair from growing and vice versa. You should not try the products that are not suitable for your hair even once. Hot styling tools are among the most important factors that prevent hair growth.
Try to stay away from these tools as much as you can.