SharePoint online tenant to tenant migration

[SB V]

Hi Community, 

Customer has built custom application in SharePoint Online and would like to move the data such as lists, document libraries, who created the data, version history of documents snf programming scripts from One M365 cloud to another.

Question:

How can we complete the tenant to tenant data and custom application migration without any data loss?

Any pointers would be of great help!

Thanks in advance!

[#2]

Can you share more details about the App?

[#3]

Thank you for the response, Juan. Please let me know what specific information you need about the app.

[#4]

Hi Juan, Thank you for the response.

The app is basically equiped to handle vendor invoices as they arrive to the company. First it requires a bar code printed and scanned along with the invoice, and when that arrives to customer site, it is attached to the invoice. Than the invoice handling will assign approvers to the invoice, along with bookkeeping assist.

Hope this clarifies.