This question came up in the Online 10-day Retreat Nov 3, 2020, guided by Delson Armstrong. Day 6 was part of a daily 30-minute discussion on the suttas, the Dhamma talk and reflections.
Slightly edited to improve readability
Yes, even in other traditions of Buddhism, like in Tibetan Buddhism, they talk about the bardo, and everything.
Those periods of intervals don't happen outside of the Mentality-Materiality, they still happen within the same Mentality. It might seem like it's an interval period between one death and the next rebirth, but that interval period is happening in the Mentality, where the Kamma is searching for a suitable rebirth, a suitable point of conception. But it's still within the Mentality of that same being before they're dying.
It’s incredibly fast, it could be split seconds, it could be even faster than that, but it might seem like it's slower, where the Kamma is searching for within the Mentality of that being.