Does anyone know about the pain associated with Rejuran?

I keep looking into the effects of Rejuran because I'm curious, but I'm hesitant because there are a lot of comments about pain.
I'm not good with injections, so I'm most worried about the pain from the procedure.
I thought Rejuran would be more painful because it involves injecting directly into various parts of the face.
I am also wondering if I will feel a lot of pain even if I apply anesthetic cream.
I've heard that it hurts more in areas with thin skin, like around the eyes or cheeks. Is that actually true?
I'm curious if the injection just stings a little or if I have to endure it for quite a while.
I would also like to know if there are people who use sleep anesthesia or other methods due to pain.
I'm also curious if the procedure time is shorter than expected.
I would like to hear your experiences regarding whether it is suitable even for someone sensitive to pain.
For those who have actually received it, please also let me know which part was the most painful.