This is an area in which debate remains, even amongst long-term practitioners.
In general, one group tends to view nibbāna as an ineffable ever-present “something” (even though they say it’s not a thing), while another group tends to understand nibbāna as cessation – so, not ever any kind of “thing” or “presence.”
But KR Norman and others have translated this as “without birth” or “free of birth” which are less likely to be reified into a “something”. Cessation is then without birth, without death…etc.
There’s been a lot of discussion about these points on the forum, which you can find via the Search function, if you wish.
