There are two artists with this name. 1) Funk/disco band from London, UK. 2) Synthwave artist from Germany.
These are photos from concerts where Heatwave played, so they may be of other bands that played the concert as well.
Let’s Rock The Moor May 21, 2022 Cookham, England, United Kingdom Uploaded by Kirsty Hart
The Havering Show Sep 26 - 27, 2018 Hornchurch, Essex. UK Uploaded by David Skipworth
The Stylistics / The Real Thing / Heatwave Nov 18, 2016 Brighton, England, United Kingdom Uploaded by Dave Fearn