QB Issue Resolution:

At this time, you won’t be able to print activities on the invoice. However, all the activities being done on the invoice this can be viewed by the customer’s end.

As a work around, you can take a screenshot of the activities so you can print this in your end.

I suggest you to read this article about: What Happens When you Send an Invoice?

Resolution for Issue 'Hi there. On invoice there is a section “activities” How can I print this list for documentation for debt recovery? Thank you.' available: Yes (Solved).
Source: Intuit Community forum.

Hi there. On invoice there is a section “activities” How can I print this list for documentation for debt recovery? Thank you.: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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