iCloud incomplete backup recovery

Hi, hope this is the right thread, but recently I traded in my old phone for a new one. I thought my phone finished backing up to the iCloud so I reset it to the defaults and erased all my data on my old phone. Of course I only found out later that it hadn't finished after all. But I do have an incomplete backup in the cloud that my iPhone 7 will not allow me to recover from. Is there any 3rd party software (trustworthy software) that will allow me to recover data from this incomplete backup?

I didn't find the right solution

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