Needing adverbs are provided in this article. The words listed here are commonly found along with the verb needing in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb NEEDING.
actually, badly
constantly, desperately
greatly, really
scarcely, sorely
suddenly, urgently
Hope this word list had the needing adverb you were looking for. In addition to adverbs used with needing, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.