Comparison
Microsoft resources
Approvals: What is Approvals? - Microsoft Support
Power Automate: Microsoft Forms in Power Automate - Power Automate | Microsoft Learn
WARN: Out subscription with Power Automate is lacking due to licensing agreements. These agreements are not easy to change because they are shared among multiple Universities (Greg Smith will be exploring this more ~2023-nov-21).
Decisions.com
Steve Weber: The tool is powerful!, However, the training necessary to learn the basics is steep. If you only have a few hours in a day to do training it might take two months. Because I neared a project deadline I had to abandon Decisions and (grab Django). Personally I think Decisions is neat but too tricky for none developers. Being a programmer I just want to code. That said, low code/no code solutions like Microsoft Forms feel like a good direction to empower less techinal staff.