SharePoint List calculated column formula using a Lookup column reference

jasenpeters calculated column formula does not support lookup (and multiple lines of text, person or group, multiple selection choice fields, etc.) columns.

Workarounds:

1. If you want to store the actual concatenated value in "ReportNumber" column (& use it somewhere else): Create a small Power automate flow on "Reports" list which will run on item creation/modification & updated the "ReportNumber" column with concatenated value using update item action & expressions.

2. If you just want to show the concatenated value in list view & do not want to use it anywhere (no need to store the value): You can use JSON column formatting to show the concatenated value in list view using simple JSON.

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