Hello and welcome to e health forum.
Most herbal supplements that are marketed online, are not approved by the US-FDA for treatment of ED.
Most such medications work similar to a placebo.
If you read the fine print on the websites of such product, you will find a disclaimers and terms and conditions mentioned, which absolve the websites of their responsibility and also that the medications advertised are not to treat or help for any medical condition including ED.
Hence when searching for herbal medications exercise caution and consult your doctor for proper advice.
I hope this helps.