Yes, it is a stereo delay on a Traynor Acoustic Master (like this one):
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I got it in a trade and was going to sell it but it's just so convenient.
Now, the stereo part of that delay is not really obvious because #1 the speakers are pretty close together and #2 the unit is off to the right in the field of view. It makes the vocal smooth out quite a bit and I have the same effect on the guitar but a little more dry and that channel is lower to balance it or slightly peek over the room/natural acoustic output of the guitar but you can definitely hear it in the slight pauses at the very beginning of that song. If I were to sing close to the mic the level of the vocal would be way too loud and the delay would be extremely obvious.
All about adding some polish so to speak instead of having cavernous reverb or something.
It bugs me a bit that when I played frequently, I could nail this song and absolutely rip the vocal - I haven't played much for 3 years and have already played more since the virus thing began than I had in those 3 years.