Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Mine is now sorted! It did take a Microsoft person around 45 minutes on my computer with remote access through the Microsoft Get Help app. Honestly, she was really good and you can see everything they are doing the entire time so that's probably the best solution for you. You can kick them off at any time as well.
I bought the same laptop as you, so clearly somethings up!
Good luck!