It's a soft-parody. It's just as serious as the bands they are riffing off (mainly Def Leppard, Racer X, Bon Jovi, Warrant, Dokken). After all, it's not Steel Panther. The band's been pretending to exist 30 years back, having gone all in with Ruff Justice (1987 2017) Forever Wild (1989 2019) and now Street Lethal (1991 2021).
Before that they released Loud Minority (2007), New Religion (2010), Riot Avenue (2012) and Crazy Lixx (2014) with various different members including Vic Zino (now in Hardcore Superstar, since 2008) and Andreas Z Eriksson (later in Inglorious with Nathan James on vocals).
They did the soundtrack to Friday the 13th: The Game a few years back and got a real push from that.
I appreciate that they don't acknowledge the parody elements and are not trying to modernize the sound in any shape or form. Most melodic rock bands like Eclipse, One Desire and many others are kind of doing the same thing but with modern elements.