Hi @Diego_Pontes ! 
A warm welcome to the community! 
Whenever you get a chance, please feel free to introduce yourself here - we'd love to get to know you! 
If I understand your question correctly - then yes, there is an alternative way to add images to an existing submission (by editing a submitted form) or to a new submission, without needing access to the Android device used for data collection. This can be done through the ODK Central server using Enketo, provided you have the Project Manager access to the corresponding project over the server.
Wishing you a great day ahead! 