I have a SP List A (InserviceUnits) that only has a Title field in it, set to unique. It is a Single Line of Text (SLT). It stores a list of assignments for a combo box in my app of all possible assignments a person can work (150 records). I have a second SP List B (Unit Seniority Roster) with a SLT field name Assignment that is the stored value of the combo box when a new record is Patched to the list (also set to unique items). SP List B also has a person field for the name of the employee (130 records), among a few other un-needed fields for this purpose.
I want to create a collection so I can send it off to Automate to create an Excel file and email to a user group. I want all the records of the assignments from SP List A and when I get a match with an employee to have the display name of the employee in a second column. So the output collection would be a column "Assignments" (150 rows) and a column "EmployeeName" (120 rows) with 30 values in EmployeeName being blank. I can do it easily in Access, but would like to stay all in the Power Platform. I have spent the last 3 hours trying multiple variations of solutions I have found on these forums and articles and youtube videos. Please unscramble my brain.
Here is an example of how I would like the collection to be when the two lists are combined.

Thank you