There are limits to how accurate you can make this. Zones like .xyz renew at 18%, so you'd expect 0.2% of those domains to expire without renewal each day. The tranco list is based on a 30 day look-back and I've seen a small percent of those domains lack name servers, even for the latest list.

Similarly, domains can be registered since the last time you downloaded your lists. So you never have a complete or accurate list.

I think it's perfectly reasonable to suggest names that have recently expired or domains that could have been recently registered. The alternative requires an NS lookup.