Cherry Bomb as a Secret Identity is new in terms of the main DC Universe. But one other predates the new Cherry Bomb.
Legionaries #44 was her first and only appearance.
https://comicvine.gamespot.com/legionnaires-44-rookies-to-the-rescue/4000-73216/
CHERRY BOMB from Stargirl.
The costume of the new Cherry Bomb looks like the original Human Bomb, Roy Lincoln.
ROY LINCOLN
Roy Lincoln, The Original Human Bomb, was a member of the Earth X team The Freedom Fighters.
A team of Super Heroes who were originally published by Quality comics made their DC Comics debut in Justice League of America of #107.
The team went to star in their own book. After it was canceled several other series followed, but without Roy Lincoln as their Human Bomb.
This version of the Freedom Fighters were Featured in the series THE ALL STAR Squadron by Roy Thomas. Their part was minor in the overall team, and not fleshed out as much as in their own series.
Helpful Info:
https://comicvine.gamespot.com/roy-lincoln/4005-47129/
https://dc.fandom.com/wiki/Roy_Lincoln_(New_Earth)
Based on Roy's Human Bomb being on the cover of THE GOLDEN AGE which introduces this version of CHERRY BOMB, it is a good bet that they may be related in some way.
But just to throw a monkey wrench in the works there were 3 other Human Bombs:
Andy Franklin
Roy Lincoln was brutally beaten to death by BIZARRO. He and many other Freedom Fighters were killed by the SOCIETY, a group of Super Villains.
From the ashes came a new group of Freedom Fighters that Included the new Human Bomb: Andy Franklin.
His costume was very different from Roy's but the powers were very similar.
This particular hero was different in many ways than Roy.
So if there is a connection to Cherry Bomb, it remains to be seen.
Helpful Info about this Human Bomb:
https://comicvine.gamespot.com/human-bomb/4005-4926/
MICHAEL TAYLOR
It is not likely that he has any connection to CHERRY BOMB at all
Other than the fact that his costume is similar to Roy's and Cherry's.
Helpful links:
http://dccontinuityproject.weebly.com/human-bomb.html
https://www.dcuniverseinfinite.com/comics/book/human-bomb-1/d9d29c22-5d3d-4570-a448-42f326e3ee5d
https://dc.fandom.com/wiki/Michael_Taylor_(Prime_Earth)
David Mathis
But I have to say Location, Location, Location.
This Human Bomb is on the wrong Earth to have any connection to Cherry Bomb. Especially if recent events have put every Super Hero on one Earth.
This Human Bomb lived under the World Wide Domination of The Nazis.
So scratch this one as well.
Helpful Links:
https://dc.fandom.com/wiki/Freedom_Fighters_(Earth_10)
https://dc.fandom.com/wiki/David_Mathis_(Earth_10)
There you have it.
Only time will tell the links to any of Gentlemen.
To be continued.
