Google is possibly testing the local pack in a five pack form, with five local results. The local results box is known as the three pack because it has shown 3 results since 2015 but we've seen Google recently test this five pack, also a two pack and a ten pack - all recently.
Dave DiGregorio spotted the five pack and posted a screenshot of it on Twitter last night, here is that screenshot:
He posted another one as well on Twitter:
5 packs baby pic.twitter.com/PS22Un34kP
— Dave DiGregorio (@deegs20) October 5, 2021
Prior to 2015, Google had a seven-pack as the default number of local listings to display before it went to a three-pack.
I cannot replicate this, I just see the three pack...
Forum discussion at Twitter and Local Search Forum.
Update: Also on mobile:
Google > Mobile
— Saad AK (@SaadAlikhan1994) November 4, 2021
Local SEO: I am seeing a Local 5-Pack in SERPs (with an Ad also).
Sending to: @rustybrick SIR.
CC: @JoyanneHawkins MAM & @ColanNielsen SIR. pic.twitter.com/bZuZs53SSx