Working with newcomers, I find bhava is useful when it is treated as a hinge: clinging tightens into becoming, and that becoming leans toward birth, ageing, and death. In the early lists, the Buddha presents this as a condition, not a verdict. See SN 12.2 and SN 12.21.
I am inclined to read that hinge as real across lives, because the texts keep tying craving to birth and death, not merely to mood shifts. Still, I wonder how much of bhava can be felt in the present body and mind before a newcomer accepts rebirth as literal. If we say it too strongly, it can become a test; if we soften it too much, it may lose the weight the texts give it.
How do you hold this? Does bhava read as a momentary becoming, a bodily tendency, or a passage across lives? And what wording helps a beginner keep it plain, without turning it into a badge?