Currently if you are creating an invoice for a Customer with multiple projects AND you use QB Time to bring in those expenses. There is no way to create an invoice for multiple projects currently. An easy way to remedy this would be to add the project name as a field with the time transaction and allow for the project name to be a filter. Then, if you could add back the "add all (by the filter, and service)" you could at least bring in projects one at a time. The best case scenario, would be to be able to add projects in based on a check off list of projects, and the time could be brought in as a whole based on service. I'm attaching a post from 2021, that showed this was previoiusly possible.

https://quickbooks.intuit.com/learn-support/en-us/reports-and-accounting/can-i-create-a-single-invoice-for-multiple-projects-if-those/00/821666