what you can do is try to connect the same google drive you used on that account, your files will be synced back to your device, but if you didn't use google drive with the audio manager app on that phone, you have no way to get your data back, but if you are concerned about the data on that phone, be assured that its not going to get found, I have personally asked them the same question on https

/audiomanager.org/ & they told me not to worry about the data, because generally, the people who found your phone will wipe the data themselves to avoid gettting detected, also the data is hidden in encryption so its almost impossible to find