Warning:  I'd only use this on a new install of the mod, where NPCs have not been dropped into the world yet. (or a new game)

If you're using a mod manager, you could drop it in below the original, enable it, and see what happens. Sometimes it works, sometimes it's a CTD, depending on what other mods got their hooks into those NPCs.



Requirements: 
More People by chixonator 
Version 1.1
https://www.nexusmods.com/skyrimspecialedition/mods/81029

This edit will NOT work at without the actual mod, so go download and give them some love and endorsements. It takes ages to make that kind of stuff.

If a new version of their mod comes out, then it will make this patch invalid, but it hasn't been updated since December 2022, so I don't know.



Summary:
If you're using something that edits the child races to un-potato the children in the game, then you'll get dark face on the children in the More People mod.

Instead of console command disabling them as I saw them, I did a quick (well, not really quick...) edit of the mod using SSEEdit to remove the children completely from the world.

I left the NPC records, but I removed them from the Cell and World space so they won't spawn in.

I give this to others to try, at their own risk. I saw it requested in the posts on the mod, and I had it, so I thought I'd let others try it.



Removed NPCs:

Solitude
protimus - child
selea - child
tahero - child
Jag - child

Winking Skeever
adena - child
lenora - child

Palace of the Kings
Frabene -child
Gelgerd - child
Aldtla - child
Argum - child

Whiterun
Halbnfid Boar-Fist - child
Hognsing - child
Iddfrida - child
Ivefing - child

Bannered Mare
Arnar - child
Astarel - child

Drunken Huntsman
Julia - child
Julius - child
Hjorin - child

Dragons Reach
Astgerd - child
Astrilda - child
Sakir the Killer
Wratod - child
Balimor - child
Bariring the Gifted - child
Dagskar - child
Gelimar - child

Riften
Inrirek - child  (misspelled in Description?)
Kataa - child
Kusrad - child
Lailfrodi - child
Olkvir - child
Ria - child
Thom - child
Darlan - child
Relie - child
Sayelie - child

Honorhall Orphanage
Lydevi - child
Mavevi - child
Revetleif - child
Rollstein Argahriksson - child
Soldonir - child

The Bee and the Barb
Rigeika - child
Rosdvild - child
Songela - child
Stebarn - child

Understone Keep
Terdur - child
Valdlaf - child

Morthal Moorside Inn
Lilith - child