It smells like wrigley’s juicy fruit. There was an old wives tale that jackfruit extract was the secret ingredient but I’m not sure I believe.
if you live near an Asian market give it a shot. My kids love the stuff.
Buy a very ripe one. It tastes so sweet. Jackfruit is sold for two purposes - make a curry (raw) or eat like a fruit (ripe). I don't think it resemble bubblegum though.