Would be great to have a wildcard such as * as well as basic filters to allow for search by: numbers or letters only, .com only etc. Also found right away a domain that is not available and registered since 1997 so wondering how accurate the list is.
Sorry that you found a registered domain. Because of how everything works, I can only make sure, that most domains are free, but there are some in ther, that might be taken. Also, .cc and .tv are not cleaned at all, currently. So there might be a lot more taken ones of these tlds.
Concerning the filters: You can search for one or multiple tdls and also exclude numbers or dashes, but only on desktop. Wildcards are not yet supported, but might be in the future.