How to make this effect

Hi,
I’m new in Cubase and I would like to know how to make the effect like in song in 3:40-3:48

Song: https://youtu.be/kDs-qWUO5BM

Thanks !

It sounds like a lot of layers with increasing reverb and increasing rate of tremolo and possibly increased compression.
No single effect. It’s likely done with a lot of automation.

Nice song! It’s a reversed reverb under the long vocal note.