It would help if you could share the domain you're trying to add.

its devwolf.qzz.io

I couldn't find any CNAME or TXT records on the specified domain...

$ nslookup -type=CNAME devwolf.qzz.io

Server:        100.100.100.100
Address:    100.100.100.100#53

** server can't find devwolf.qzz.io: NXDOMAIN

$ nslookup -type=TXT _railway-verify.devwolf.qzz.io

Server:        100.100.100.100
Address:    100.100.100.100#53

** server can't find _railway-verify.devwolf.qzz.io: NXDOMAIN

huh?

OH IM DUMB

THE DOMAIN IS DEVFLOW

NOT WOLF

OMGG

SORRY

No worries haha.

but still dont work

devflow.qzz,io

qzz.io*

(If you're not aware, DNS records and their values aren't sensitive, they are publicly searchable)