Meross MSS620 Plug
Available from:
Amazon.de
Wi-Fi Module:
MediaTek MT7662
Try to avoid similar devices from other sellers using same images and descriptions!
The Instructables article by Detlef Amend at https://www.instructables.com/id/MEROSS-MSS620-a-Journey-Into-Strangeness/ describes a tear down and all the (unfortunate) findings.