Papi has accepted changelings from other hives, including several from Chrysalis’s hive that had defected, some of which were shown in the last update. The changelings may face some prejudice from former ponies, depending on the converted drone’s former opinions on changelings and other hives were before their change.
Papi has yet to refuse sanctuary to another changeling, and would only do so if they presented a clear and present danger to her hive and subjects. If this was the case and the changeling persisted in its pleas it would be allowed in, but watched carefully and if trust was broken then it would be chased out and forbidden from returning.