Legal status refers to legal personality i.e. the capacity to have rights and bear responsibilities under a legal system.
The humanitarian rules of the law of armed conflict, and the special agreements for which they provide, do not affect the status of the parties to the conflict - i.e. armed groups - or of an occupied territory. IHL applies without further implication as to their legal personality under other branches of international law. Hence, the application of IHL to armed groups, for instance, does not imply that they have acquired international legal personality or does not amount to the recognition of belligerency. This is explicitly mentioned in Common Article 3 of the Geneva Conventions.
See Status; Armed groups;
Chapter 12, VIII. Who is bound by the Law of NIAC?
Chapter 12, IX. Consequences of the Existence of a NIAC on the Legal Status of the Parties
Common 3/4 (see ICRC updated Commentary)