Approver Comments:
We can't actually infer anything other than what we know. In fact, deaths in the ghetto were often recorded. When we don't have information on a subject, there are any number of reasons why: the document was lost, it was mis-transcribed so we can't find the information as easily, it's sitting in an archive that hasn't been opened yet, or it was never created. It's not easy to jump to conclusions when we research this history. Don't give up hope--keep looking!
In this case in particular, you'll want to check lots of other spellings: Lea might be an analogue of Leah/Laja/Laia/Leja/Leia, and Inowlocka might turn up as Inowlocki (female/male forms of the last name).
We also know her addresses: Froschweg 12 flat 4, Froschweg 15 (after December 12, 1942) and Kreuzstrasse 16--which means that we also know she was alive as of December 12, 1942, and missed at least two sets of major deportations in the spring and fall of 1942.