The phrase "however that may be" is commonly used to indicate that the speaker is unsure about something or is acknowledging the possibility of alternative perspectives. When looking for synonyms for this phrase, one might consider using terms such as "regardless," "in any case," "nevertheless," or "be that as it may." These alternatives can convey a similar sense of uncertainty or open-mindedness, while also adding variety and nuance to one's language. It's always a good idea to have a range of synonyms at one's disposal, as this can help to make one's writing or speech more interesting and engaging to others.