Maybe you wanted to say about USDN, not about WUSD and WEUR.
WUSD: https://dev.pywaves.org/assets/Ft8X1v1LTa1ABafufpaCWyVj8KkaxUWE6xBhW6sNFJck
WEUR: https://dev.pywaves.org/assets/Gtb1WRznfchDnTh37ezoDTJ4wcoKaRsKqKjJjy7nm2zU
On https://waves.exchange/ this is named as cUSD and cEUR,
and this tokens are available by this Asset ID's.
This seems like a SCAM-tokens, now, on this bear market, because,
but WUSD was been traded 1:1 from 2016 year!
https://coincodex.com/crypto/wusd/?period=ALL
I cann't change matcher there, on https://waves.exchange/
because in the "Settings -> Network",
there is "input" fields are readonly, this have attribute disabled="disabled",
and there is possible to copy the default matcher, and not able to change this.
Sorry I got confused with that. It is a pity that there were a lot of issues with coinomat already at the beginning.
It was never a scam but its handling was getting due to time worse and worser... Due to problems with withdrawing the tokens they got kind of worthless.
So this is a pity that was then an old feature; Now deactivated in the change of WAVES strategies.