Lora for young male around 20 years old with skinny proportion at high strength, maybe need adjustment in neg prompt and lora strength to got the desired result, Adetailer also recommended or else inpaint to get desired result.

Ignore V2 & V3 as it considered outdated and the output pretty bad

Adetailer and Clip skip is must for this loRa or else the output pretty bad
you can use Clip Skip - 1 or 2 depends on which model you use

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For V4-Heavy training - weight 0.8 is recommended

Hires Fix - Esrgan_4x, Denoise 0.5

Reason to fix imperfection

Adetailer - Face yolo/Mediapipe full mesh, Turn on Restore face in Adetailer

Reason to add Asian feature more as weight 0.8 below could be influence by default model of checkpoint

If you want asian look weight it more between 0.5-1,
To get mix of ethnic use around 0.65 than increased/decrease it until desired level - [For Heavy Training]
but beware around 0.8-1 it might affect output badly or unwanted result

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For V4- Medium

weight from 0.5-1, need Adetailer/Inpainting as well due too less affect to character although sometimes it can,
I encourage to use in any creativity mode too but it up to you

For [SyahnkV4-04] can do up to 1 as less affect the image due to medium training

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The activation tag is
syahnk

positive prompt - masterpiece, best quality, highres, realistic, handsome, photogenic, masculine, (big muscles),<lora:syahnkV4-08:0.5>, syahnk as ((dark tanned)) [prompt]
Neg prompt - kid,teenager, boy, immature,Watermark, Text, censored, deformed, bad anatomy, disfigured, poorly drawn face, mutated, extra limb, ugly, poorly drawn hands, missing limb, floating limbs, disconnected limbs, disconnected head, malformed hands, long neck, mutated hands and fingers, bad hands, missing fingers, cropped, worst quality, low quality, mutation, poorly drawn, skinny calf, bad hands, fused hand, missing hand, disappearing arms, disappearing thigh, disappearing calf, disappearing legs, missing fingers, fused fingers, abnormal eye proportion, Abnormal hands, abnormal legs, abnormal feet, abnormal fingers

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Lora - Adetailer is recommended as well to add detail feature

as my lora tends to give boyish and East Asian like plus small body due to skinny fat proportion and close up photo [ old version]

Newer version seems gave East Asian look than SEA

recommended use Adetailer as well
ADetailer - MediaPipe Face Full/Mesh
Sampler - DPM 2M++ Karras/Euler a

or else it will gave output look alike East Asian and not SouthEast Asian

you can share in below the photo you have generated thanks :)

Syahnk - SouthEast Asian male - Flux Version