All of the transfer methods I am aware of involve having the actual Android phone in hand to do the transfer. Apple has a utility and I think there are third-party utilities as well, but all require you to have the phone itself and not just a backup.
As Android is a product of Google you may find that there are iOS apps that will connect to Google's services and allow you to bring the data over from the Google cloud.
Mail, Calendar and Contacts will directly open a gmail account and suck in the data and, I believe will, Google's photos app for iOS. There are other equivalents but they all depend on those accounts being active and the iPhone connecting to the services to use that data.
However I have never seen a utility that will "restore" an Android backup to an iPhone as the data formats are likely incompatible with the iPhone.