On this page of coins of Kanishka I the eighth bronze coin listed has similarities to yours.
https://www.coinindia.com/galleries-kanishka.html
It's listed as an AE tetradrachm c. 128-150 CE
The appearance is similar as are the weight and diameter, which are positives for autheniticity. Maybe with the coin in hand you can tell if the writing is similar. I have only encountered a couple of fake Kushan coins and these were rather obvious, so I don't think they're widely faked.