I read through the document - I only saw 3 application specific questions, which I have listed both the question and answer below.
Q1 If we go to the Manufacturing tab, we can see the planning results as informational. Is this applicable only when the replenishment source is Manufacturing?
A1 - No, the Manufacturing Tab displays only when the Manufacturing module is enabled on the enable/disable features screen. The fields are displayed mainly for backward compatability as the fields used to be maintained on the Manufacturing tab planning values were moved to the Inventory Planning tab for usability reasons.
Q2 - Is there any override option at the Item Warehouse level or the Stock Item level to change the Stocking method from Safety Stock to Reorder Point?
A2 - No. In your version, the configuration exists only at the system/global level. We are working to change this for 2026R2 or later. Additionally, MRP does not consider min/max values - these fields exist to support the Inventory Replenishment function.
Q3 - Also, what is the purpose of the Manufacturing tab, and what controls are available on the Manufacturing tab in the Item Warehouse Details form?
A3 - only to provide all settings related to manufacturing in a single spot. The production order default values are provided for convenience.
Questions specific to the implementation of MFG and MRP should be directed to someone who knows your business intimately - I cannot provide guidance on the implementation approach.
If any other functional questions were missed, please reply and call them out.
It may be helpful to review all the Release Notes between the version you are coming from and 2025R2.
Also, are you aware of the published Whitepaper? (link below)