@mayunakoki , sorry for the delay :-)
My skin and hair was looking better because I did it in CC3.3+  :-) And there are some very cool light environment presets,  that I have used.

@mayunakoki , will tell you tomorrow :-)

A few questions.. is your Max texture settings set too low?
have  you tried using  IBL?
I'm not sure how much it will work with hair but using smooth mesh by subdivision can improve quality.

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76% of original size (was 665x19) - Click to enlarge
AMD 4.5 GHz 16 Cores  | 128 GB | RTX 4090 | Window11 | Houdini FX 18.5 | Zbrush 2023 | Maya 2014 | Adobe CS6 | Sonar Producer X3 | iC8, CC4 | DTS Master Audio Suite | Perception Neuron 32 Alum Edition | Akeytsu 

The triangle of the hair is 193056

I captured the hair and setting. The hair from your cc3 looks more realistic, and the skin looks natural. What is setting do you use? 
I changed the hair from PBR to digital human hair. How can I make the hair look photorealistic? ALso please let me know light setting. I used key, side and back light with checking on SSS transmission and GI indirect light
76% of original size (was 665x19) - Click to enlarge
76% of original size (was 665x19) - Click to enlarge
76% of original size (was 665x19) - Click to enlarge76% of original size (was 665x19) - Click to enlarge76% of original size (was 665x19) - Click to enlarge76% of original size (was 665x19) - Click to enlarge76% of original size (was 665x19) - Click to enlarge

Yes , exported via FBX from Daz and imported via Transform (Basic , because I only wanted the hair)  into CC3.
The hair has a lot of layers , thats good , so you can change the hair color of some strands.
You can use the original Daz hair textures to tweak your hair stands (mix it up).
I don't know how your hair looks like in CC3 or IC , but very important is also the lighting.

Wow! It is the same hair that I used in iclone. But your hair looks so much better than me. The head in my iclone is very thin and I can see the skin of head through the hair. My graphic card is nvidia GTX 770. Is that causing problem? If so, I will buy nvidia 2070 super. I will capture the hair from my iclone tomorrow. How did you export FBX from daz? Please let me know export setting.

Here is the hair in CC3 , no tweaking , not that bad ...
I asked for the triangles , it has 190.000 (normal) , thats ok for Unreal , but I like it in CC3 :-)

76% of original size (was 665x19) - Click to enlarge

Keys : Control "F"  (on/off) ,  then you can see in the viewport how many triangles the whole scene has , when you select the hair you can see the triangles count of the hair (Selected Triangle)

Where can I find triangle ? In iclone ???
Do you mean this?

How many triangles do you see in your viewer?