Synchronizing Photos and Data with Xamarin, Asp.Net Core, and MSSQL

Good day!

I am in the process of developing an internal application for merchandising purposes, intended not for the general user base. However, I'm encountering an issue: our employees often find themselves in locations with either no internet connection or a very poor one, which hinders their ability to upload necessary photos for their tasks. The development is utilizing Xamarin, Asp.Net Core for the API and MSSQL as the database.

My question to the community is: how can we implement functionality that would allow employees to collect the required data throughout the day and upload it at the touch of a "Upload" button at the end of the day when internet access becomes available? Are there proven approaches or tools that could facilitate the implementation of such a solution? Your advice and experience would be incredibly valuable in overcoming this challenge.