Dear StephenPalmstrom,
I'm very glad to see you in Microsoft Community.
I understand that the IIS manager cannot run the PHP manager and that the missing CGI settings icon is bothering you.
However, this issue is beyond the scope of technical support on our Microsoft forums. Post this question on Microsoft Docs, where you can get more solutions.
Wish you have a good day!
Best regards,
Zoee | Microsoft Community Support Specialist