Not sure where that is... But you could try asking here (and hopefully get answrd)
https://www.mangago.zone/read-manga/mangago_how_to_guide/
Like, comment what you jst said
Tag? Do u mean when ur done reading ur tagging it?, cuz if thats what r u saying. When u go to your already read click that tag it will go to ur already read and all the story u tag it will ve there example
Tag= HOLY PEAK STORY
TRASH
Dam of the forest =HPS
Moriarty the patriot=HPS
Yohaji=HPS
Jinx=TRASH
Twilight= TRASH
U clicked HPS
HPS
dam of the forest
Moriarty the Patriots
Yohaji
U clicked TRASH
Jinx
Twilight

I've been using this app for years but I'm not really sure how the tag function works, I see when I Mark something as red I can add like a tag thing to it, but I can't really access the text itself to find other stories. I know some links work for stories for tags but I don't know how to access that, this is also my first time posting the question and I actually had no idea this thing existed until a couple of months ago
I've been here for years just to read( ̄∇ ̄")